Introduction -Table of Contents


1 
Introduction ....................................... 1

1.1 
General remarks ..................................... 1

1.2 
Experimental methods .................................. 1

1.2.1 
Spectroscopy ....................................... 1

1.2.2 
Electron diffraction ................................... 4


1.2.3 
Combined use of diffraction and spectroscopy, theoretical calculations, or other methods 6

1.3 
Significance of geometric parameters .......................... 7

1.3.1 
Spectroscopy ....................................... 7

1.3.2 
Electron diffraction ................................... 9


1.3.3 
Table of distance parameters and their definitions .................... 10

1.4 
Uncertainties ....................................... 11

1.4.1 
Microwave spectroscopy ................................. 11

1.4.2 
Infrared and Raman spectroscopy ............................ 11

1.4.3 
Electron diffraction ................................... 12


1.5 
Geometric structures of molecules in excited electronic states .............. 13

1.6 
Arrangement of the tables ................................ 16

1.6.1 
General remarks on the content .............................. 16

1.6.2 
Presentation of the data and comments .......................... 16

1.6.3 
Order of molecules .................................... 17

1.6.4 
Nomenclature ...................................... 18

1.6.5 
Figures and structural formulae ............................. 18

1.6.6 
Features of CD-ROM version .............................. 18

1.7 
References for 1.11.6 ................................. 19

1.8 
References to general literature .............................. 21

1.8.1 
General ......................................... 21

1.8.2 
Microwave spectroscopy ................................. 21


1.8.3 
Infrared, Raman and electronic spectroscopy ....................... 22

1.8.4 
Electron diffraction ................................... 23

1.9 
List of symbols and abbreviations ............................ 25

1.9.1 
List of symbols ...................................... 25

1.9.2 
List of abbreviations ................................... 25


La n d o lt-B r n st e in New Series II/25B 
CF2O2 Difluorodioxirane 091 CF2O2 Fluorocarbonyl hypofluorite 092 CF2S Thiocarbonyl difluoride 093 CF2Se Selenocarbonyl difluoride 094 CF3 Trifluoromethyl radical 095 CF3I Trifluoromethyl iodide 096 CF3N N,1,1-Trifluoromethanimine 097 CF3NO Trifluoronitrosomethane 098 CF3NOS N-(Fluorocarbonyl)imidosulfurous difluoride 099 CF3NOSi Trifluoro(isocyanato)silane 100 CF3NO2 Trifluoronitromethane 101 CF3NSi Cyanotrifluorosilane 102 CF3NSi Trifluoroisocyanosilane 103 CF3N3 Azidotrifluoromethane 104 CF4 Carbon tetrafluoride 105 
+ Tetrafluoromethane(1+) ion 106CF 4 CF4N2P2 Bis(difluorophosphino)carbodiimide 107 CF4O Trifluoromethyl hypofluorite 108 CF4OS Trifluoromethanesulfinyl fluoride 109 CF4O2 Trifluorofluoroperoxymethane 110 CF4O4S2 Difluorobis(fluorosulfonyl)methane 111 CF4S Trifluoromethanesulfenyl fluoride 112 CF4S2 Fluoro(trifluoromethyl)disulfane 113 CF5N Pentafluoromethanamine 114 CF5NOS Cyanatopentafluorosulfur 115 CF5NOS Pentafluoro(isocyanato)sulfur 116 CF5NOSe Cyanatopentafluoroselenium 117 CF5NOTe Pentafluoro(isocyanato)tellurium 118 CF5NS N-(Trifluoromethyl)imidosulfurous difluoride 119 CF5NS Cyanopentafluorosulfur 120 CF6S Trifluoro(trifluoromethyl)sulfur 121 CF6Si Trifluoro(trifluoromethyl)silane 122 CF7P (Trifluoromethyl)tetrafluorophosphorane 123 CF8S Pentafluoro(trifluoromethyl)sulfur 124 CF8S2 -(Difluoromethylene)bis(trifluorosulfur) 125 CF8S2 -Carbido-pentafluorosulfur(VI)trifluorosulfur(VI) 126 CF12S2 -(Difluoromethylene)bis[pentafluorosulfur] 127 CHNSe Isoselenocyanic acid 173 CHN2 Carbonimidoylamidogen 174 CHN3 Hydrogen cyanide - dinitrogen (1/1) 175 CHN3O Hydrogen cyanide  dinitrogen monoxide (1/1) 176 CHN3O6 Trinitromethane 177 CHNeO+ Formyl cation - neon (1/1) 178 CHO- Formyl anion 179 CHO Formyl radical 180 CHO+ Formyl cation 181 CHO+ Hydroxocarbon(1 + ) ion 182 
+ Hydroxo(oxo)carbon(1+) ion 183CHO 2 CHP Methylidynephosphine 184 CHP+ Methylidynephosphine(1+) ion 185 CHV Methylidynevanadium(III) 186 
CH2O3 
Performic acid 232

CH2O3 
Carbon dioxide  water (1/1) 233

CH2S- 
Thioformaldehyde(1-) ion 234

CH2S 
Thioformaldehyde 235

CH2S2 
Dithioformic acid 236

CH2Se 
Methaneselenal 237

CH3F2P 
(Difluoromethyl)phosphine 283

CH3F2P 
Difluoro(methyl)phosphine 284

CH3F2PS 
Methylphosphonothioic difluoride 285

CH3F2PS 
Difluoro(methylthio)phosphine 286

CH3F3Ge 
(Trifluoromethyl)germane 287

CH3F3Ge 
Trifluoro(methyl)germane 288

CH3F3OSi 
Trifluoromethoxysilane 289

CH3F3S 
Trifluoromethylsulfurane 290

CH3F3Si 
Methyltrifluorosilane 291

CH3F3Si 
(Trifluoromethyl)silane 292

CH3F4NP2 
Methyliminobis(difluorophosphine) 293

CH3F4NS 
Sulfur tetrafluoride methylimide 294

CH3F4P 
Tetrafluoromethylphosphorane 295

CH3GeN 
Germyl cyanide 296

CH3GeNO 
Germyl isocyanate 297

CH3GeNS 
Germyl isothiocyanate 298

CH3HgI 
Methylmercury iodide 299

CH3I 
Methyl iodide 300

CH3N 
Methylnitrene radical 301

CH3N 
Methanimine 302

CH3NO 
Nitrosomethane 303

CH3NO 
Formaldehyde oxime 304

CH3NO 
Formamide 305

CH3NO 
Carbon monoxide - ammonia (1/1) 306

CH3NO 
Hydrogen cyanide - water (1/1) 307

CH3NOS 
N-Sulfinylmethanamine 308

CH3NOSi 
Silyl isocyanate 309

CH3NO2 
Methyl nitrite 310

CH3NO2 
Nitromethane 311

CH3NO2 
Carbon dioxide  ammonia (1/1) 312

CH3NO3 
Methyl nitrate 313

CH3NS 
Thioformamide 314

CH3NS 
Hydrogen cyanide  hydrogen sulfide (1/1) 315

CH3NSSi 
Silyl isothiocyanate 316

CH3NSi 
Silyl cyanide 317

CH3N3 
Methyl azide 318

CH3N3O4 
N,N-Dinitromethanamine 319

CH3O 
Methoxyl radical 320

CH3O+ 
Formyl cation - dihydrogen (1/1) 321

CH3OSr 
Strontium monomethoxide 322

CH3O3Re 
Methyltrioxorhenium(VII) 323

CH3P 
Methylenephosphine 324

CH3S- 
Methanethiolate anion 325

CH3S 
Methylthio radical 326

CH3Zn 
Monomethylzinc 327


C2F3N C2F3N C2F3NO C2F3NSe C2F3N2S2 C2F3N3S C2F4 C2F4I2 C2F4N2 C2F4O C2F4O C2F4O3S C2F4S C2F4S2 C2F4Se2 C2F5I C2F5N3S2 
C2F5P C2F6 C2F6Hg C2F6NO C2F6N2 C2F6N2 C2F6N2OS C2F6N2O2 C2F6O C2F6OS C2F6O2 C2F6O2S C2F6O3 C2F6S C2F6S C2F6S2 C2F6S3 C2F6S4 C2F6Se C2F6Se2 C2F7N C2F8N2S 
C2F8OS C2F8O2S2 C2F8S C2F8S C2F8Se C2F9P C2F10S C2F12S2 
C2FeN2O4 
Trifluoromethyl cyanide
Trifluoromethyl isocyanide
Trifluoromethyl isocyanate
Trifluoromethyl selenocyanate

481 
482 
483 
484 

4-(Trifluoromethyl)-3H-1,2,3,5-dithiadiazol-3-yl 485
1,3-Difluoro-5-(trifluoromethyl)-1.4,3.4,2,4,6-497
dithiatriazine

1,3,5-Trifluoro-1.4,2,4,6-thiatriazine 486

Tetrafluoroethene 487

1,1,2,2-Tetrafluoro-1,2-diiodoethane 488

Azinobis(difluoromethane) 489

Trifluoroacetyl fluoride 490

Tetrafluoroethylene oxide 491

3,3,4,4-Tetrafluoro-1,2-oxathietane 2,2-dioxide 492

Tetrafluorothiirane 493

Tetrafluoro-1,3-dithietane 494

Tetrafluoro-1,3-diselenetane 495

Pentafluoroethyl iodide 496

(Difluoromethylene)(trifluoromethyl)phosphine 498

Hexafluoroethane
Bis(trifluoromethyl)mercury
Bis(trifluoromethyl)nitroxyl
cis-Hexafluoroazomethane
trans-Hexafluoroazomethane

499 
500 
501 
502 
503 


Bis(trifluoromethyl)aminyl thionitrosyl oxide 504

O-Nitroso-N,N-bis(trifluoromethyl)hydroxylamine 505

Bis(trifluoromethyl) ether
Bis(trifluoromethyl) sulfoxide
Bis(trifluoromethyl) peroxide
Bis(trifluoromethyl) sulfone
Bis(trifluoromethyl) trioxide
Bis(trifluoromethyl) sulfide
Trifluoroethylidynesulfur trifluoride
Bis(trifluoromethyl) disulfide
Bis(trifluoromethyl)trisulfane
Bis(trifluoromethyl)tetrasulfane
Bis(trifluoromethyl) selenide
Bis(trifluoromethyl) diselenide
N-Fluorobis(trifluoromethyl)amine
(Trifluoromethyl)(pentafluoro-.6-
sulfanyl)carbodiimide
Bis(trifluoromethyl)thionyl difluoride

506 
507 
508 
509 
510 
511 
512 
513 
514 
515 
516 
517 
518 
519 520 


2,2,3,3,3,3,4,4-Octafluoro-3.6-dithiethane 1,1-dioxide 521

Bis(trifluoromethyl)sulfur difluoride 522

Pentafluoro(trifluorovinyl)sulfur 523

Difluorobis(trifluoromethyl)selenium 524

Bis(trifluoromethyl)trifluorophosphorane 525

Bis(trifluoromethyl)sulfur tetrafluoride 526

Tetrafluoro-1,3-dithietane octafluoride 527

Dicarbonyldinitrosyliron 528


- Vinylidene anion 570 C2H 2 C2H2 Acetylene 571 
+ Acetylene ion 572 
C2H 2 C2H2Ar Acetylene - argon (1/1) 573 C2H2ArF2 1,1-Difluoroethylene  argon (1/1) 574 C2H2ArN2 Hydrogen cyanide - argon (2/1) 575 C2H2ArO Ketene - argon (1/1) 576 C2H2AsCl3 (E)-(2-Chloroethenyl)arsinous dichloride 577 C2H2BrClO Bromoacetyl chloride 578 C2H2BrN Bromoacetonitrile 579 C2H2Br2 cis-1,2-Dibromoethene 580 C2H2Br2O Bromoacetyl bromide 581 C2H2ClF3 1-Chloro-2,2,2-trifluoroethane 582 C2H2ClN Chloroacetonitrile 583 C2H2Cl2 1,1-Dichloroethylene 584 C2H2Cl2 cis-1,2-Dichloroethylene 585 C2H2Cl2 trans-1,2-Dichloroethylene 586 C2H2Cl2 Acetylene - dichlorine (1/1) 587 C2H2Cl2Hg Chloro[(Z)-2-chloroethenyl]mercury 588 C2H2Cl2O Chloroacetyl chloride 589 C2H2Cl2O2 Dichloroacetic acid 590 C2H2FN Fluoroacetonitrile 591 C2H2FNO Carbon monoxide  hydrogen cyanide  592 C2H2F2 1,1-Difluoroethylene 593 C2H2F2 cis-1,2-Difluoroethene 594 C2H2F2 trans-1,2-Difluoroethylene 595 C2H2F2O Fluoroacetyl fluoride 596 C2H2F2O cis-1,2-Difluoroethylene oxide 597 C2H2F2O trans-1,2-Difluoroethylene oxide 598 C2H2F2O2 Difluoroacetic acid 599 C2H2F2O3 cis-Difluoroethylene ozonide 600 C2H2F2O3 trans-Difluoroethylene ozonide 601 C2H2F2O3 1,1-Difluoroethylene ozonide 602 C2H2F3N Fluoroform - hydrogen cyanide (1/1) 603 C2H2F4 1,1,1,2-Tetrafluoroethane 604 C2H2F4 1,1,2,2-Tetrafluoroethane 605 C2H2GeI2 1,1-Diiodogermacycloprop-2-ene 606 


C2H2N Cyanomethanide ion 607 C2H2NP Methylenephosphinous cyanide 608 C2H2N2 Hydrogen cyanide dimer 609 C2H2N2 N-Cyanoformimine 610 C2H2N2O Furazan 611 C2H2N2O 1,3,4-Oxadiazole 612 C2H2N2O Cyanogen  water (1/1) 613 C2H2N2O Acetylene  nitrous oxide (1/1) 614 
C2H2N2S 
1,2,3-Thiadiazole 615

C2H2N2S 
1,2,4-Thiadiazole 616

C2H2N2S 
1,2,5-Thiadiazole 617

C2H2N2S 
1,3,4-Thiadiazole 618

C2H2N2Se 
1,2,5-Selenadiazole 619

C2H2N2Se 
1,3,4-Selenadiazole 620

C2H2N4 
Azidoacetonitrile 621

C2H2N4 
1,2,4,5-Tetrazine 622

C2H2N4 
Hydrogen cyanide  dinitrogen (2/1) 623

C2H2O 
Ketene 624

C2H2OS 
Thioxoacetaldehyde 625

C2H2O2 
Glyoxal 626

C2H2O2S 
Acetylene  sulfur dioxide (1/1) 627

C2H2O3 
Formic acid anhydride 628

C2H2O3 
Formaldehyde  carbon dioxide (1/1) 629

C2H2O3 
Acetylene  ozone (1/1) 630

C2H2O3 
Carbon monoxide - water (2/1) 631

C2H2O4 
Oxalic acid 632

C2H2O5 
Carbon dioxide  water (2/1) 633

C2H2S 
Thioketene 634

C2H2Se 
Selenoketene 635

C2H2Si 
Silacycloprop-2-enylidene 636

C2H3F5S 
Ethenylpentafluorosulfur 683

C2H3F7S 
Methyl(trifluoromethyl)sulfur tetrafluoride 684

C2H3HgN 
Methylmercury cyanide 685

C2H3I 
Vinyl iodide 686

C2H3IO 
Acetyl iodide 687

C2H3N 
Ethenimine 688

C2H3N 
Acetonitrile 689

C2H3N 
Methyl isocyanide 690

C2H3NO 
Acetonitrile N-oxide 691

C2H3NO 
Methyl cyanate 692

C2H3NO 
Methyl isocyanate 693

C2H3NO 
Formaldehyde - hydrogen cyanide (1/1) 694

C2H3NO 
Nitrosoethylene 695

C2H3NO2 
Nitroethene 696

C2H3NO3S 
Acetonitrile - sulfur trioxide (1/1) 697

C2H3NS 
Methyl thiocyanate 698

C2H3NS 
Methyl isothiocyanate 699

C2H3NSe 
Methyl selenocyanate 700

C2H3NSe 
Methyl isoselenocyanate 701

C2H3N3 
Vinyl azide 702

C2H3N3 
2H-1,2,3-Triazole 703

C2H3N3 
1H-1,2,4-Triazole 704

C2H3N3 
Cyanogen  ammonia (1/1) 705

C2H3N5 
3-Amino-s-tetrazine 706

C2H3O-Acetaldehyde enolate anion 707

C2H3O 
Formylmethyl radical 708

C2H3P 
Ethynylphosphine 709

C2H3P 
Ethylidynephosphine 710

C2H4O 
Acetaldehyde 756

C2H4O 
Vinyl alcohol 757

C2H4O 
Oxirane 758

C2H4O 
Acetylene - water (1/1) 759

C2H4OS 
O-Methyl thioformate 760

C2H4OS 
S-Methyl thioformate 761

C2H4OS 
Thiirane 1-oxide 762

C2H4OS 
Mercaptoacetaldehyde 763

C2H4OS2 
1,3-Dithiacyclobutane 1-oxide 764

C2H4O2 
Formaldehyde dimer 765

C2H4O2 
Methyl formate 766

C2H4O2 
Acetic acid 767

C2H4O2 
Glycolaldehyde 768

C2H4O2 
Methanol - carbon monoxide (1/1) 769

C2H4O2S 
Ethylene sulfone 770

C2H4O2S 
Ethylene - sulfur dioxide (1/1) 771

C2H4O3 
Glycolic acid 772

C2H4O3 
1,2,4-Trioxacyclopentane 773

C2H4O3 
1,2,3-Trioxolane 774

C2H4O3 
Ethylene - ozone (1/1) 775

C2H4O3S 
Ethylene sulfite 776

C2H4O3Se 
Ethylene selenite 777

C2H4O4 
Formic acid dimer 778

C2H4O4Si 
Bis(formyloxy)silane 779

C2H4S 
Ethenethiol 780

C2H4S 
Thioacetaldehyde 781

C2H4S 
Ethylene sulfide 782

C2H4S3 
1,2,4-Trithiolane 783

C2H4Se 
Selenoacetaldehyde 784

C2H4Si 
Ethynylsilane 785

C2H5NOSi 
Methylsilyl isocyanate 832

C2H5NO2 
Nitroethane 833

C2H5NO2 
Ethyl nitrite 834

C2H5NO2 
Glycine 835

C2H5NO3 
Ethyl nitrate 836

C2H5NS 
Thioacetamide 837

C2H5NSSi 
Methylsilyl isothiocyanate 838

C2H5NSi 
Methylsilanecarbonitrile 839

C2H5N3 
Hydrogen cyanide  ammonia (2/1) 840

C2H5O 
Ethoxyl 841

C2H5P 
Phosphirane 842

C2H5P 
Vinylphosphine 843

C2H6O 
Dimethyl ether 890

C2H6O 
Ethylene - water (1/1) 891

C2H6OS 
Dimethyl sulfoxide 892

C2H6OS 
2-Mercaptoethanol 893

C2H6OSSi 
Silyl thioacetate 894

C2H6O2 
Dimethyl peroxide 895

C2H6O2 
1,2-Ethanediol 896

C2H6O2S 
Dimethyl sulfone 897

C2H6O2S2 
Dimethoxydisulfane 898

C2H6O2Si 
Silyl acetate 899

C2H6O3S 
Dimethyl ether  sulfur dioxide (1/1) 900

C2H6O4S 
Dimethyl sulfate 901

C2H6S 
Dimethyl sulfide 902

C2H6S 
Ethanethiol 903

C2H6S2 
Dimethyl disulfide 904

C2H6S2 
1,2-Ethanedithiol 905

C2H6Se 
Ethaneselenol 906

C2H6Se 
Dimethyl selenide 907

C2H6Se2 
Dimethyl diselenide 908

C2H6Si 
Vinylsilane 909

C2H6Si2 
Disilylacetylene 910

C2H6Te 
Dimethyl telluride 911

C2H6Te2 
Dimethylditellurane 912

C2H6Zn 
Dimethylzinc 913







CArClN  Cyanogen chloride  argon (1/1)  001  
CArF2O  Carbonyl difluoride  argon (1/1)  002  
CArO  Carbon monoxide - argon (1/1)  003  
CArOS  Carbonyl sulfide - argon (1/1)  004  
CArO2  Carbon dioxide - argon (1/1)  005  
CAr2OS  Carbon oxysulfide - diargon (1/1)  006  
CAr2O2  Carbon dioxide - diargon (1/1)  007  
CAsF3N6  Diazido(trifluoromethyl)arsane  008  
CBF3O  Carbon monoxide - boron trifluoride (1/1)  009  
CBF3O2  Carbon dioxide - boron trifluoride (1/1)  010  
CBrClF2  Bromochlorodifluoromethane  011  
CBrClO  Carbon monoxide - bromine chloride (1/1)  012  
CBrCl3  Bromotrichloromethane  013  
CBrF  Bromofluoromethylene  014  
CBrF2N  N-Bromodifluoromethanimine  015  
CBrF3  Bromotrifluoromethane  016  
CBrF3S  Bromo(trifluoromethyl)sulfur  017  
CBrF3S2  Bromo(trifluoromethyl)disulfane  018  
CBrN  Cyanogen bromide  019  
CBrN+  Cyanogen bromide cation  020  
CBrNO  Bromine isocyanate  021  
CBrNS  Bromine thiocyanate  022  
CBrN3O6  Bromotrinitromethane  023  
CBr2  Dibromomethylene radical  024  
CBr2F3N  N,N-Dibromo-1,1,1-trifluoromethanamine  025  
CBr2O  Carbonyl dibromide  026  
CBr2S  Thiocarbonyl dibromide  027  
CBr3  Tribromomethyl radical  028  
CBr3NO2  Tribromonitromethane  029  
CBr4  Tetrabromomethane  030  
CClF  Chlorofluoromethylene  03  
CClFO  Carbonyl chloride fluoride  03  
CClFOS  (Fluorocarbonyl)sulfenyl chloride  0 3  
CClFS  Thiocarbonyl chloride fluoride  03  
CClF2N  N-Chlorodifluoromethanimine  03  
CClF3  Chlorotrifluoromethane  03  
CClF3O  Trifluoromethyl hypochlorite  03  
CClF3O2  (Chloroperoxy)trifluoromethane  03  
CClF3O2S  Trifluoromethanesulfonyl chloride  03  

CClF3S  Trifluoromethanesulfenyl chloride  040  
CClF3S2  Chloro(trifluoromethyl)disulfane  041  
CClF7S  Chlorotetrafluoro(trifluoromethyl)sulfur  042  
CClN  Chlorine cyanide  043  
CClN+  Cyanogen chloride cation  044  
CClNO  Chlorine isocyanate  045  
CClNO3S  Sulfonyl chloride isocyanate  046  
CClNS  Chlorine thiocyanate  047  
CClN3O6  Chlorotrinitromethane  048  
CClP  (Chloromethylidyne)phosphine  049  
CCl2  Dichloromethylene  050  
CCl2F2  Dichlorodifluoromethane  051  
CCl2F2S  Chlorodifluoromethanesulfenyl chloride  052  
CCl2F3N  N,N-Dichloro-1,1,1-trifluoromethanamine  053  
CCl2F6Si2  Dichlorobis(trifluorosilyl)methane  054  
CCl2NO2P  Dichloroisocyanatophosphine oxide  055  
CCl2N2O4  Dichlorodinitromethane  056  
CCl2O  Carbonyl dichloride  057  
CCl2O  Carbon monoxide - dichlorine (1/1)  058  
CCl2OS  Carbonyl chloride thiohypochlorite  059  
CCl2OS  Thiocarbonyl dichloride S-oxide  060  
CCl2S  Thiocarbonyl dichloride  061  
CCl3F  Trichlorofluoromethane  062  
CCl3FS  Dichlorofluoromethanesulfenyl chloride  063  
CCl3N  N,1,1-Trichloromethanimine  064  
CCl3NOSi  Trichloro(isocyanato)silane  065  
CCl3NO2  Trichloronitromethane  066  
CCl4  Carbon tetrachloride  067  
CCl4F3P  (Trifluoromethyl)tetrachlorophosphorane  068  
CCl4O2S  Trichloromethanesulfonyl chloride  069  
CCl4S  Trichloromethanesulfenyl chloride  070  
CCl6Ge  Trichloro(trichloromethyl)germane  071  
CCl8Si2  Dichlorobis(trichlorosilyl)methane  072  
CFN  Fluorine cyanide  073  
CFNO2S2  S-Fluorocarbonyl-N-sulfinylthiohydroxylamine  074  
CFN3O  Carbonazidic fluoride  075  
CFO  Fluorocarbonyl  076  
CFO 2 -  Fluoroformate anion  077  
CFO2  Fluoroformyloxyl radical  078  
CFP  (Fluoromethylidyne)phosphine  079  
CF2  Difluoromethylene  080  
CF2I2  Difluorodiiodomethane  08  
CF2N  Difluoromethylimino radical  08  
CF2NOP  Difluoroisocyanatophosphine  08  
CF2NP  Cyanodifluorophosphine  08  
CF2NPS  Difluoroisothiocyanatophosphine  08  
CF2NPSe  Difluoro(isoselenocyanato)phosphine  086  
CF2N2  Difluorocyanamide  087  
CF2N2  Difluorodiazirine  088  
CF2N2OS  Cyanoimidosulfuryl difluoride  089  
CF2O  Carbonyl difluoride  090  



CHgOS  Carbonyl sulfide  mercury (1/1)  406  
CHgO2  Carbon dioxide  mercury (1/1)  407  
CIN  Cyanogen iodide  408  
ClNO  Iodine isocyanate  409  
CKN  Potassium cyanide  410  
CKrO  Carbon monoxide - krypton (1/1)  411  
CKrOS  Carbonyl sulfide - krypton (1/1)  412  
CKrO2  Carbon dioxide - krypton (1/1)  413  
CLiN  Lithium isocyanide  414  
CMgN  Magnesium isocyanide  415  
CMnN3O4  Carbonyltrinitrosylmanganese  416  
CNNa  Sodium cyanide  417  
CNO- Cyanate anion  418  
CNO  Cyanato radical  419  
CNOSr  Strontium monoisocyanate  420  
CNS  Thiocyanato radical  421  
CN2  sym-Carbodiimide  422  
CN2O  Nitrosyl cyanide  423  
CN2O  Carbon monoxide  dinitrogen (1/1)  424  
CN2O2  Carbon monoxide  dinitrogen monoxide (1/1)  425  
CN4  Cyanogen azide  426  
CN4O8  Tetranitromethane  427  
CNeO  Carbon monoxide - neon (1/1)  428  
CNeOS  Carbonyl sulfide - neon (1/1)  429  
CNeO2  Carbon dioxide - neon (1/1)  430  
COS  Carbonyl sulfide  431  
COSe  Carbonyl selenide  432  
COXe  Carbon monoxide - xenon (1/1)  433  
CO2  Carbon dioxide  434  
CO 2 +  Carbon dioxide(1+) ion  435  
CO2Xe  Carbon dioxide - xenon (1/1)  436  
CO3S  Carbon monoxide  sulfur dioxide (1/1)  437  
CSSe  Thiocarbonyl selenide  438  
CSTe  Thiocarbonyl telluride  439  
CS2  Carbon disulfide  440  
CS 2 +  Carbon disulfide(1+) ion  441  
CSe2  Carbon diselenide  442  


CHArN  Hydrogen cyanide - argon (1/1)  128  
CHArNO  Fulminic acid - argon (1/1)  129  
CHArNO  Isocyanic acid - argon (1/1)  130  
CHArO+  Formyl cation - argon (1/1)  131  
CHAr2N  Hydrogen cyanide - diargon (1/1)  132  
CHBF3N  Hydrogen cyanide - trifluoroborane (1/1)  133  
CHBrClF  Bromochlorofluoromethane  134  
CHBrCl2  Bromodichloromethane  135  
CHBrO  Carbon monoxide  hydrogen bromide (1/1)  136  
CHBrO2  Carbon dioxide - hydrogen bromide (1/1)  137  
CHBr2Cl  Dibromochloromethane  138  
CHBr3  Bromoform  139  
CHCl  Chloromethylene  140  
CHClF2  Chlorodifluoromethane  141  
CHClO  Formyl chloride  142  
CHClO  Carbon monoxide - hydrogen chloride (1/1)  143  
CHClOS  Carbonyl sulfide - hydrogen chloride (1/1)  144  
CHClO2  Carbon dioxide - hydrogen chloride (1/1)  145  
CHCl2N  Hydrogen cyanide - dichlorine (1/1)  146  
CHCl3  Chloroform  147  
CHCl5Si  (Dichloromethyl)trichlorosilane  148  
CHF  Fluoromethylene  149  
CHFO  Formyl fluoride  150  
CHFO  Carbon monoxide - hydrogen fluoride (1/1)  151  
CHFOS  Carbonyl sulfide  hydrogen fluoride (1/1)  152  
CHFO2  Carbon dioxide - hydrogen fluoride (1/1)  153  
CHF2P  (Difluoromethylene)phosphine  154  
CHF3  Fluoroform  155  
CHF3O2  Trifluoromethyl hydroperoxide  156  
CHF3O3S  Trifluoromethanesulfonic acid  157  
CHF3O6S3  Tris(fluorosulfonyl)methane  158  
CHF3S  Trifluoromethanethiol  159  
CHF3S2  Trifluoromethyl hydrodisulfide  160  
CHHeO+  Formyl cation - helium (1/1)  161  
CHHgN  Hydrogen cyanide - mercury (1/1)  162  
CHIO  Carbon monoxide - hydrogen iodide (1/1)  163  
CHKrN  Hydrogen cyanide - krypton (1/1)  164  
CHN  Hydrogen cyanide  165  
CHN  Hydrogen isocyanide  166  
CHN+  Hydrogen cyanide cation  167  
CHNO  Isocyanic acid  168  
CHNO  Fulminic acid  169  
CHNO2S  Hydrogen cyanide - sulfur dioxide (1/1)  170  
CHNO3S  Hydrogen cyanide - sulfur trioxide (1/1)  171  
CHNS  Isothiocyanic acid  172  


CH 2 -  Methylene anion  187  
CH2  Methylene  188  
CH2ArO  Formaldehyde - argon (1/1)  189  
CH2ArO2  Formic acid - argon (1/1)  190  
CH2BrCl  Bromochloromethane  191  
CH2BrF  Bromofluoromethane  192  
CH2BrN  Hydrogen cyanide - hydrogen bromide (1/1)  193  
CH2Br2  Dibromomethane  194  
CH2Cl  Chloromethyl radical  195  
CH2ClF  Chlorofluoromethane  196  
CH2ClF2OP  (Chloromethyl)phosphonic difluoride  197  
CH2ClN  Hydrogen cyanide - hydrogen chloride (1/1)  198  
CH2ClNO2  Chloronitromethane  199  
CH2ClP  Chloro(methylene)phosphine  200  
CH2Cl2  Dichloromethane  201  
CH2Cl3OP  (Chloromethyl)phosphonic dichloride  202  
CH2Cl3P  Dichloro(chloromethyl)phosphine  203  
CH2Cl3PS  (Chloromethyl)phosphonothioic dichloride  204  
CH2Cl4O2P2  Methylenebis(phosphonic dichloride)  205  
CH2Cl4P2  Methylenebis(phosphonous dichloride)  206  
CH2Cl4Si  (Chloromethyl)trichlorosilane  207  
CH2Cl4Sn  (Chloromethyl)trichlorostannane  208  
CH2Cl6Si2  Bis(trichlorosilyl)methane  209  
CH2F  Fluoromethyl radical  210  
CH2FN  Hydrogen cyanide - hydrogen fluoride (1/1)  211  
CH2FP  Fluoro(methylene)phosphine  212  
CH2F2  Difluoromethane  213  
CH2F3P  (Trifluoromethyl)phosphine  214  
CH2F4P2S2  Bis(difluorophosphonothioyl)methane  215  
CH2F4S  Tetrafluoromethylenesulfur  216  
CH2F6Si2  Bis(trifluorosilyl)methane  217  
CH2F10S2  Methylenebis(pentafluorosulfur)  218  
CH2IN  Hydrogen cyanide - hydrogen iodide (1/1)  219  
CH2N+  Protonated hydrogen cyanide  220  
CH2N2  Diazomethane  221  
CH2N2  Cyanamide  222  
CH2N2  Diazirine  223  
CH2O  Formaldehyde  224  
CH2OS  Thioformic acid  225  
CH2OS  Thioformaldehyde S-oxide  226  
CH2OS2  Carbon disulfide - water (1/1)  227  
CH2O2  Formic acid  228  
CH2O2  Dioxirane  229  
CH2O2  Carbon monoxide - water (1/1)  230  
CH2O2S  Carbon dioxide  hydrogen sulfide (1/1)  231  


CH3  Methyl radical  238  
CH 3 +  Methyl cation  239  
CH3ArCl  Methyl chloride - argon (1/1)  240  
CH3ArNO  Formamide - argon (1/1)  241  
CH3ArNO  Hydrogen cyanide - argon - water (1/1/1)  242  
CH3AsF2  Difluoromethylarsine  243  
CH3BBr2  Dibromomethylborane  244  
CH3BCl2  Dichloromethylborane  245  
CH3BF2  Difluoromethylborane  246  
CH3BO  Carbonyltrihydroboron  247  
CH3BS  Methylthioxoborane  248  
CH3Br  Methyl bromide  249  
CH3BrHg  Methylmercury bromide  250  
CH3Br2PS  Dibromomethylthiophosphine  251  
CH3Br3Ge  Tribromo(methyl)germane  252  
CH3Br3Si  Tribromo(methyl)silane  253  
CH3Ca  Monomethylcalcium  254  
CH3Cd  Monomethylcadmium  255  
CH3Cl  Methyl chloride  256  
CH3ClHg  Methylmercury chloride  257  
CH3ClN2O2  N-Chloro-N-nitromethanamine  258  
CH3ClO  Methyl hypochlorite  259  
CH3ClO  Formaldehyde - hydrogen chloride (1/1)  260  
CH3ClO2S  Methanesulfonyl chloride  261  
CH3ClO3S  Methyl chlorosulfate  262  
CH3ClS  Methanesulfenyl chloride  263  
CH3Cl2OP  Phosphorodichloridous acid methyl ester  264  
CH3Cl2OP  Methylphosphonic dichloride  265  
CH3Cl2OPS  O-Methyl phosphorodichloridothioate  266  
CH3Cl2OPS  S-Methyl phosphorodichloridothioate  267  
CH3Cl2O2P  Methyl phosphorodichloridate  268  
CH3Cl2P  Methyldichlorophosphine  269  
CH3Cl2PS  Dichloro(methylthio)phosphine  270  
CH3Cl3Ge  Trichloro(methyl)germane  271  
CH3Cl3Si  Trichloro(methyl)silane  272  
CH3Cl3Sn  Trichloro(methyl)stannane  273  
CH3Cl3Ti  Trichloro(methyl)titanium  274  
CH3F  Fluoromethane  275  
CH3FO  Formaldehyde - hydrogen fluoride (1/1)  276  
CH3FO2S  Methanesulfonyl fluoride  277  
CH3FO3S  Methyl fluorosulfate  278  
CH3F2N  N,N-Difluoromethanamine  279  
CH3F2OP  Difluoromethoxyphosphine  280  
CH3F2OP  Methylphosphonic difluoride  281  
CH3F2O2P  Phosphorodifluoridic acid methyl ester  282  


CH4  Methane  328  
CH 4 +  Methane cation  329  
CH4ArO  Methanol - argon (1/1)  330  
CH4ClN  N-Chloromethanamine  331  
CH4ClP  (Chloromethyl)phosphine  332  
CH4Cl2Si  Dichloro(methyl)silane  333  
CH4F2NP  Difluoro(methylamino)phosphine  334  
CH4F2Si  Difluoro(methyl)silane  335  
CH4F3N  Trifluoromethane  ammonia (1/1)  336  
CH4NP  Hydrogen cyanide  phosphine (1/1)  337  
CH4N2  (E)-Methyldiazene  338  
CH4N2  Hydrogen cyanide  ammonia (1/1)  339  
CH4N2O2  N-Nitromethanamine  340  
CH4O  Methanol  341  
CH4OS  Methanesulfenic acid  342  
CH4O2  Methyl hydroperoxide  343  
CH4O2Si  Silyl formate  344  
CH4O3S  Methanol - sulfur dioxide (1/1)  345  
CH4O4  Carbon dioxide - water (1/2)  346  
CH4S  Methanethiol  347  
CH4S2  Methyldisulfane  348  
CH4Se  Methaneselenol  349  


CH5BO  Methoxyborane  350  
CH5Br  Methane - hydrogen bromide (1/1)  351  
CH5BrGe  Bromo(methyl)germane  352  
CH5BrSi  (Bromomethyl)silane  353  
CH5Cl  Methane  hydrogen chloride (1/1)  354  
CH5ClGe  Chloro(methyl)germane  355  
CH5ClGe  (Chloromethyl)germane  356  
CH5ClO  Methanol  hydrogen chloride (1/1)  357  
CH5ClSi  Chloro(methyl)silane  358  
CH5ClSi  (Chloromethyl)silane  359  
CH5Cl4NSi2  N,N-Bis(dichlorosilyl)methanamine  360  

CH5F  Methane  hydrogen fluoride (1/1)  361  
CH5FGe  Fluoro(methyl)germane  362  
CH5FN2  Hydrogen cyanide  hydrogen fluoride  ammonia  363  
(1/1/1)  
CH5FSi  Fluoro(methyl)silane  364  
CH5ISi  Iodo(methyl)silane  365  
CH5N  Methylamine  366  
CH5NO  N-Methylhydroxylamine  367  
CH5NO  O-Methylhydroxylamine  368  
CH5NO2  Formamide - water (1/1)  369  
CH5NO3  Nitromethane - water (1/1)  370  
CH5NSi2  Disilanyl cyanide  371  
CH5P  Methylphosphine  372  


CH6BF2P  Difluoromethylphosphine  borane (1/1)  373  
CH6ClN  Methylamine - hydrogen chloride(1/1)  374  
CH6Ge  Methylgermane  375  
CH6Ge2N2  Digermylcarbodiimide  376  
CH6N2  Methylhydrazine  377  
CH6N2Si2  Disilylcarbodiimide  378  
CH6O  Methane - water (1/1)  379  
CH6OSi  Methyl silyl ether  380  
CH6P2  Methylenebisphosphine  381  
CH6SSi  Methylsilanethiol  382  
CH6SSi  Methyl silyl sulfide  383  
CH6Si  Methylsilane  384  
CH6Sn  Methylstannane  385  
CH7B5  Carba-closo-hexaborane(7)  386  
CH7NO  Methanol - ammonia (1/1)  387  
CH7PSi  Methyl(silyl)phosphine  388  
CH8BP  Methylphosphine  borane (1/1)  389  
CH8B2  Methyldiborane(6)  390  
CH8B4O  Carbonyltetraborane(8)  391  
CH8N2S3  Ammonium trithiocarbonate  392  
CH8Si2  Disilylmethane  393  
CH9B2N  -(Methylamino)-diborane(6)  394  
CH9B5  2-Carba-nido-hexaborane(9)  395  
CH9NSi2  N-Methyl-N-silylsilanamine  396  
CH10Si3  Trisilylmethane  397  
CH11AlB2  Methylaluminum bis(tetrahydroborate)  398  
CH11AsB10  p-Arsacarborane  399  
CH11B5  1-Methyl-nido-pentaborane(9)  400  
CH11B5  2-Methyl-nido-pentaborane(9)  401  
CH11B10P  p-Phosphacarborane  402  
CH12GeSi3  Methyltrisilylgermane  403  
CH12Si4  Tetrasilylmethane  404  
CH12Si4  2-Methyl-2-silyltrisilane  405  



C2ArN2  Argon  Cyanogen (1/1)  443  
C2AsF6N3  Bis(trifluoromethyl)arsinous azide  444  
C2BF3N2  Dicyan - boron trifluoride (1/1)  445  
C2BrCl  Bromochloroacetylene  446  
C2BrF  Bromofluoroacetylene  447  
C2BrFN2  N-Bromocyanofluoromethanimine  448  
C2BrF6N  N-Bromo-1,1,1-trifluoro-N- 449  
(trifluoromethyl)methanamine  
C2BrI  Bromoiodoacetylene  450  
C2Br2F4  1,2-Dibromo-1,1,2,2-tetrafluoroethane  451  
C2Br2O2  Oxalyl dibromide  452  
C2Br4  Tetrabromoethene  453  
C2Br4N2  Dibromoformaldehyde azine  454  
C2ClF  Chlorofluoroacetylene  455  
C2ClF3OS  (Z)-2,2,2-Trifluoroethanethioyl chloride S-oxide  456  
C2ClF6N  N-Chloro-1,1,1-trifluoro-N- 457  
(trifluoromethyl)methanamine  
C2ClF6NS  N-Chloro-S,S-bis(trifluoromethyl)sulfimine  458  
C2ClI  Chloroiodoacetylene  459  
C2ClNO2  Chlorocarbonyl isocyanate  460  
C2Cl2  Dichloroacetylene  461  
C2Cl2F2  1,1-Dichloro-2,2-difluoroethylene  462  
C2Cl2F4  1,2-Dichloro-1,1,2,2-tetrafluoroethane  463  
C2Cl2N2O2Si  Dichlorosilylene diisocyanate  464  

C2Cl2O  Dichloroketene  465  
C2Cl2O2  Oxalyl dichloride  466  
C2Cl3F3  1,1,1-Trichloro-2,2,2-trifluoroethane  467  
C2Cl3F6P  Trichlorobis(trifluoromethyl)phosphorane  468  
C2Cl3N  Trichloroacetonitrile  469  
C2Cl4  Tetrachloroethene  470  
C2Cl4N2  1,2-(Dichloromethylidene)diazane  471  
C2Cl4O  Trichloroacetyl chloride  472  
C2Cl6  Hexachloroethane  473  
C2Cl6O2S  Bis(trichloromethyl)sulfone  474  
C2FNO2  Carbonisocyanatidic fluoride  475  
C2F2  Difluoroacetylene  476  
C2F2OS2  4,4-Difluoro-1,3-dithietan-2-one  477  
C2F2O2S2  Bis(fluorocarbonyl)disulfane  478  
C2F2O4  Bis(fluorocarbonyl) peroxide  479  
C2F2S3  4,4-Difluoro-1,3-dithietane-2-thione  480  


C2H  Ethynyl  529  
C2HArF3  Trifluoroethene  argon ( 1/1)  530  
C2HBF2  Ethynyldifluoroborane  531  
C2HBr  Bromoacetylene  532  
C2HBr+  Bromoacetylene cation  533  
C2HBrF2  2-Bromo-1,1-difluoroethene  534  
C2HBrO  Bromoketene  535  
C2HCa  Ethynylcalcium  536  
C2HCl  Chloroacetylene  537  
C2HCl+  Chloroacetylene cation  538  
C2HClF3N  N-(Trifluoromethyl)chloromethanimine  539  
C2HClO  Chloroketene  540  
C2HCl2F3  2,2-Dichloro-1,1,1-trifluoroethane  541  
C2HCl3O  Dichloroacetyl chloride  542  
C2HF  Fluoroacetylene  543  
C2HFN2  Cyanogen - hydrogen fluoride (1/1)  544  
C2HFO  Fluoroketene  545  
C2HF2N  Difluoroacetonitrile  546  
C2HF3  Trifluoroethylene  547  
C2HF3O  Difluoroacetyl fluoride  548  
C2HF3O2  Trifluoroacetic acid  549  
C2HF3O3S  3,4,4-Trifluoro-1,2-oxathietane 2,2-dioxide  550  
C2HF4N  N-(Trifluoromethyl)fluoromethanimine  551  
C2HF4NS2  4,4,5,5-Tetrafluoro-1,3,2-dithiazolidine  552  
C2HF4P  Ethynyltetrafluorophosphorane  553  
C2HF5  Pentafluoroethane  554  
C2HF5S  Ethynylpentafluorosulfur  555  
C2HF5Se  Pentafluoroethaneselenol  556  
C2HF6N  Bis(trifluoromethyl)amine  557  
C2HF6NO  N,N-Bis(trifluoromethyl)hydroxylamine  558  
C2HF6PS2  Bis(trifluoromethylthio)phosphine  559  
C2HI  Iodoacetylene  560  
C2HI+  Iodoacetylene cation  561  
C2HN  Cyanomethylene radical  562  
C2HNO  Hydrogen cyanide  carbon monoxide (1/1)  563  
C2HNOS  Hydrogen cyanide - carbonyl sulfide (1/1)  564  
C2HNO2  Hydrogen cyanide - carbon dioxide (1/1)  565  
C2HNO2S  1,3,4-Oxathiazol-2-one  566  
C2HN 2 +  Protonated cyanogen  567  
C2HN3  Diazoacetonitrile  568  
C2HO  Oxoethenyl  569  



C2H3  Vinyl radical  637  
C2H3ArF  Vinyl fluoride  argon (1/1)  638  
C2H3ArN  Acetonitrile  argon (1/1)  639  
C2H3ArN5  3-Amino-s-tetrazine - argon complex  640  
C2H3Ar2N5  3-Amino-s-tetrazine - argon (1/2)  641  
C2H3As  Ethylidynearsine  642  
C2H3BF2  Difluoro(vinyl)borane  643  
C2H3BF3N  Acetonitrile  trifluoroborane (1/1)  644  
C2H3Br  Vinyl bromide  645  
C2H3BrN2  3-Bromo-3-methyl-3H-diazirine  646  
C2H3BrO  Acetyl bromide  647  
C2H3Br3  1,1,1-Tribromoethane  648  
C2H3Cl  Vinyl chloride  649  
C2H3Cl  Acetylene - hydrogen chloride (1/1)  650  
C2H3ClF2  1-Chloro-1,1-difluoroethane  651  
C2H3ClF2  1,1-Difluoroethene - hydrogen chloride (1/1)  652  
C2H3ClN2  3-Chloro-3-methyl-3H-diazirine  653  
C2H3ClN2  Hydrogen cyanide  hydrogen chloride (2/1)  654  
C2H3ClO  Acetyl chloride  655  
C2H3ClO  Chloroacetaldehyde  656  
C2H3ClOS  S-Methyl chloromethanethioate  657  
C2H3ClO2  Methyl chloroformate  658  
C2H3ClO2  Chloroacetic acid  659  
C2H3ClO2S  Ethenesulfonyl chloride  660  
C2H3ClSi  Silylchloroacetylene  661  
C2H3Cl2OP  Ethenylphosphonic dichloride  662  
C2H3Cl2P  Vinyldichloroposphine  663  
C2H3Cl3  1,1,1-Trichloroethane  664  
C2H3Cl3  1,1,2-Trichloroethane  665  
C2H3Cl3Si  Trichloro(ethenyl)silane  666  
C2H3F  Vinyl fluoride  667  
C2H3F  Acetylene - hydrogen fluoride (1/1)  668  
C2H3FN2  Hydrogen cyanide  hydrogen fluoride (2/1)  669  
C2H3FO  Acetyl fluoride  670  
C2H3FOS2  Methyl fluorocarbonyl disulfide  671  
C2H3FO2  Hydroxyacetyl fluoride  672  
C2H3FO2  Fluoroacetic acid  673  
C2H3FO2  Methyl fluoroformate  674  
C2H3FO2  Fluoromethyl formate  675  
C2H3FO3  2-Fluoro-1,3,4-trioxolane  676  
C2H3F3  1,1,1-Trifluoroethane  677  
C2H3F3  1,1,2-Trifluoroethane  678  
C2H3F3Hg  Methyl(trifluoromethyl)mercury  679  
C2H3F3N2  trans-1,1,1-Trifluoroazomethane  680  
C2H3F3O  2,2,2-Trifluoroethanol  681  
C2H3F3O  Trifluoromethoxymethane  682  


C2H4  Ethylene  711  
C2H 4 +  Ethylene(1+) ion  712  
C2H4ArO  Oxirane - argon (1/1)  713  
C2H4ArO  Acetaldehyde - argon (1/1)  714  
C2H4ArS  Thiirane  argon 1/1)  715  
C2H4AsBrO2  2-Bromo-1,3,2-dioxarsolane  716  
C2H4AsBrS2  2-Bromo-1,3,2-dithiarsolane  717  
C2H4AsClO2  2-Chloro-1,3,2-dioxarsolane  718  
C2H4Br  Bromoethyl radical  719  
C2H4BrCl  1-Bromo-2-chloroethane  720  
C2H4BrF  1-Bromo-2-fluoroethane  721  
C2H4Br2  1,2-Dibromoethane  722  
C2H4ClF  1-Chloro-2-fluoroethane  723  
C2H4ClF  Vinyl fluoride - hydrogen chloride (1/1)  724  
C2H4ClN  1-Chloroaziridine  725  
C2H4ClN  Acetonitrile - hydrogen chloride (1/1)  726  
C2H4ClN  Methyl isocyanide - hydrogen chloride (1/1)  727  
C2H4ClNO  2-Chloroacetamide  728  
C2H4ClNO  (E)-(Chloroacetaldehyde oxime)  729  
C2H4ClNO  (Z)-(Chloroacetaldehyde oxime)  730  
C2H4ClOPS  3-Chloro-1,3-thiaphosphetane 3-oxide  731  
C2H4ClO2P  2-Chloro-1,3,2-dioxaphospholane  732  
C2H4ClO3P  2-Chloro-1,3,2-dioxaphospholane 2-oxide  733  
C2H4ClPS2  2-Chloro-1,3,2-dithiaphospholane  734  
C2H4ClPS3  2-Chloro-1,3,2-dithiaphospholane 2-sulfide  735  
C2H4Cl2  1,1-Dichloroethane  736  
C2H4Cl2  1,2-Dichloroethane  737  
C2H4Cl2  Ethene - dichlorine (1/1)  738  
C2H4Cl2N2O2  N-Nitrobis(chloromethyl)amine  739  
C2H4Cl2O  Dichloromethyl methyl ether  740  
C2H4Cl2O  Bis(chloromethyl) ether  741  
C2H4Cl4Si2  1,1,3,3-Tetrachloro-1,3-disilacyclobutane  742  
C2H4FN  Acetonitrile  hydrogen fluoride (1/1)  743  
C2H4FNO  2-Fluoroacetamide  744  
C2H4F2  1,1-Difluoroethane  745  
C2H4F2  1,2-Difluoroethane  746  
C2H4F2O  2,2-Difluoroethanol  747  
C2H4F3N  2,2,2-Trifluoroethylamine  748  
C2H4Ge  Germylacetylene  749  
C2H4INO  2-Iodoacetamide  750  
C2H4I2  1,2-Diiodoethane  751  
C2H4N2  Formaldehyde azine  752  
C2H4N2  Aminoacetonitrile  753  
C2H4N2  3-Methyl-3H-diazirine  754  
C2H4N2O  Hydrogen cyanide  water (2/1)  755  


C2H5BF2  Ethyldifluoroborane  786  
C2H5BO2  1,3,2-Dioxaborolane  787  
C2H5B3  1,5-Dicarba-closo-pentaborane(5)  788  
C2H5B4Cl  2-Chloro-1,6-dicarba-closo-hexaborane(6)  789  
C2H5Br  Ethyl bromide  790  
C2H5BrO  2-Bromoethanol  791  
C2H5BrO  Oxirane - hydrogen bromide (1/1)  792  
C2H5BrO2S  Bromomethyl methyl sulfone  793  
C2H5BrS  Thiirane - hydrogen bromide (1/1)  794  
C2H5Cl  Ethyl chloride  795  
C2H5Cl  Ethylene - hydrogen chloride (1/1)  796  
C2H5ClN2O2  N-Chloromethyl-N-nitromethylamine  797  
C2H5ClO  Chloromethoxymethane  798  
C2H5ClO  2-Chloroethanol  799  
C2H5ClO  Oxirane - hydrogen chloride (1/1)  800  
C2H5ClS  Chloromethyl methyl sulfide  801  
C2H5ClS  Thiirane - hydrogen chloride (1/1)  802  
C2H5ClSi  Chloro(vinyl)silane  803  
C2H5Cl2P  Ethyldichlorophosphine  804  
C2H5Cl2PS  Ethylphosphonothioic dichloride  805  
C2H5F  Fluoroethane  806  
C2H5F  Ethylene  hydrogen fluoride (1/1)  807  
C2H5FO  2-Fluoroethanol  808  
C2H5FO  Fluoromethoxymethane  809  
C2H5FO  Oxirane - hydrogen fluoride (1/1)  810  
C2H5FSi  Fluoro(vinyl)silane  811  
C2H5F2N  2,2-Difluoroethylamine  812  
C2H5F2P  Ethyldifluorophosphine  813  
C2H5F2PS  (Ethylthio)difluorophosphine  814  
C2H5F2PS  Ethylphosphonothioic difluoride  815  
C2H5GeN  Methylgermyl cyanide  816  
C2H5I  Ethyl iodide  817  
C2H5IO  2-Iodoethanol  818  
C2H5IO  Iodomethyl methyl ether  819  
C2H5N  Vinylamine  820  
C2H5N  (Z)-Ethanimine  821  
C2H5N  (E)-Ethanimine  822  
C2H5N  N-Methylenemethanamine  823  
C2H5N  Ethylenimine  824  
C2H5N  Methane  hydrogen cyanide (1/1)  825  
C2H5N  Acetylene  ammonia (1/1)  826  
C2H5NO  Acetamide  827  
C2H5NO  N-Methylformamide  828  
C2H5NO  Nitrosoethane  829  
C2H5NO  Acetonitrile - water (1/1)  830  
C2H5NO  Methanol- hydrogen cyanide (1/1)  831  


C2H6  Ethane  844  
C2H6AsF3Si  Dimethyl(trifluorosilyl)arsine  845  
C2H6BCl2N  (Dimethylamino)dichloroborane  846  
C2H6BF3O  Dimethyl ether - boron trifluoride (1/1)  847  
C2H6BN  Methyl isocyanide - borane (1/1)  848  
C2H6BN3  Azidodimethylborane  849  
C2H6B2S3  3,5-Dimethyl-1,2,4,3,5-trithiadiborolane  850  
C2H6B4  1,6-Dicarba-closo-hexaborane(6)  851  
C2H6B4  1,2-Dicarba-closo-hexaborane(6)  852  
C2H6B5F  5-Fluoro-2,4-dicarbaheptaborane(7)  853  
C2H6Be  Dimethylberyllium  854  
C2H6Br2Ge  Dimethylgermanium dibromide  855  
C2H6Cd  Dimethylcadmium  856  
C2H6ClN  N-Chloro-N-methylmethanamine  857  
C2H6ClNO2S  Dimethylsulfamoyl chloride  858  
C2H6ClO2PS  O,O'-Dimethyl phosphonochloridothioate  859  
C2H6Cl2Ge  Dichlorodimethylgermane  860  
C2H6Cl2NOP  (Dimethylamino)dichlorophosphine oxide  861  
C2H6Cl2NP  (Dimethylamino)dichlorophosphine  862  
C2H6Cl2Si  Dichlorodimethylsilane  863  
C2H6Cl2Sn  Dichlorodimethylstannane  864  
C2H6Cl3NSi  N-(Trichlorosilyl)dimethylamine  865  
C2H6Cl4Ga2  Di--chloro-bis[chloromethylgallium(III)]  866  
C2H6FN  N-Fluorodimethylamine  867  
C2H6FN  2-Fluoroethylamine  868  
C2H6FO2P  Methyl methylphosphonofluoridate  869  
C2H6FPS  Fluorodimethylphosphine sulfide  870  
C2H6F2Ge  Difluorodimethylgermane  871  
C2H6F2NP  (Dimethylamino)difluorophosphine  872  
C2H6F2Si  Difluorodimethylsilane  873  
C2H6F3NS  (Dimethylamino)trifluorosulfur(IV)  874  
C2H6F3NSi  N-(Trifluorosilyl)dimethylamine  875  
C2H6F3P  Dimethylphosphorus trifluoride  876  
C2H6F6N2P2  2,2,2,4,4,4-Hexafluoro-2,2,4,4-tetrahydro- 877  
C2H6Ge  Vinylgermane  878  
C2H6GeOS  Germyl thioacetate  879  
C2H6GeO2  Germyl acetate  880  
C2H6Hg  Dimethylmercury  881  
C2H6N2  cis-Azomethane  882  
C2H6N2  trans-Azomethane  883  
C2H6N2  3-Methyldiaziridine  884  
C2H6N2O  N-Nitrosodimethylamine  885  
C2H6N2O2  N-Nitrodimethylamine  886  
C2H6N2O2  N-Methyl-N'-methoxydiazene N-oxide  887  
C2H6N2S  N,N'-Dimethylsulfur diimide  888  
C2H6O  Ethanol  889  


C2H7BN4  1,3-Dihydro-1,4-dimethyl-5H-tetrazaborole  914  
C2H7B5  2,4-Dicarba-closo-heptaborane(7)  915  
C2H7ClSi  Chlorodimethylsilane  916  
C2H7ClSi  Ethylchlorosilane  917  
C2H7Cl2NSi  (Dimethylamino)dichlorosilane  918  
C2H7FSi  Ethylfluorosilane  919  
C2H7N  Dimethylamine  920  
C2H7N  Ethylamine  921  
C2H7NO  N,O-Dimethylhydroxylamine  922  
C2H7NO  2-Aminoethanol  923  
C2H7NOS  S,S-Dimethylsulfoximine  924  
C2H7NO2  Methanol - formamide (1/1)  925  
C2H7NO2  N-Methoxy-O-methylhydroxylamine  926  
C2H7NO2S  Dimethylamine  sulfur dioxide (1/1)  927  
C2H7NS  2-Aminoethanethiol  928  
C2H7P  Dimethylphosphine  929  
C2H7P  Ethylphosphine  930  


C2H8B6  1,7-Dicarba-closo-octaborane(8)  931  
C2H8BrNSi  (Dimethylamino)bromosilane  932  
C2H8ClNSi  (Dimethylamino)chlorosilane  933  
C2H8Ge  Dimethylgermane  934  
C2H8Ge  Ethylgermane  935  
C2H8INSi  (Dimethylamino)iodosilane  936  
C2H8N2  1,1-Dimethylhydrazine  937  
C2H8N2  1,2-Dimethylhydrazine  938  
C2H8N2  1,2-Ethanediamine  939  
C2H8N2S  Diimidodimethylsulfur  940  
C2H8OSi  (Methoxymethyl)silane  941  
C2H8O2  Methanol dimer  942  
C2H8Si  Ethylsilane  943  
C2H8Si  Dimethylsilane  944  
C2H8Si2  1,3-Disilacyclobutane  945  
C2H8Sn  Dimethylstannane  946  
C2H8Sn  Ethylstannane  947  


C2H9B7  1,6-Dicarba-closo-nonaborane(9)  948  
C2H9NO  Dimethylamine - water (1/1)  949  
C2H9NSi  N-Silyldimethylamine  950  
C2H9PSi  Dimethylsilylphosphine  951  
C2H10AlB  Dimethylaluminum tetrahydroborate  952  
C2H10BGa  Dimethylgallium tetrahydroborate  953  
C2H10BP  Ethylphosphine  borane (1/1)  954  
C2H10BP  Dimethylphosphine - borane (1/1)  955  
C2H10B2  1,1-Dimethyldiborane(6)  956  
C2H10B2  cis-1,2-Dimethyldiborane(6)  957  
C2H10B2  trans-1,2-Dimethyldiborane(6)  958  
C2H10B8  1,2-Dicarba-closo-decaborane(10)  959  
C2H10B8  1,10-Dicarba-closo-decaborane(10)  960  
C2H10B10Cl2  1,7-Dichloro-1,7-dicarba-closo-dodecaborane(12)  961  
C2H10B10I2  5,12-Diiodo-1,7-dicarba-closo-dodecaborane(12)  962  
C2H10B10I2  1,7-diiodo-1,7-dicarba-closo-dodecaborane(10)  963  
C2H10B10I2  1,12-Diiodo-1,12-dicarba-closo-dodecaborane (10)  964  
C2H10OSi2  1,3-Dimethyldisiloxane  965  
C2H10SSi2  Bis(methylsilyl) sulfide  966  
C2H11B2N  Dimethylaminodiborane  967  
C2H11NSi2  N-Ethyl-N-silylsilanamine  968  
C2H12B4  2,4-(1,2-Ethanediyl)tetraborane(10)  969  
C2H12B10  1,2-Dicarba-closo-dodecaborane(12)  970  
C2H12B10  1,7-Dicarba-closo-dodecaborane(12)  971  
C2H12B10  1,12-Dicarba-closo-dodecaborane(12)  972  
C2H14AlB3  Dimethylaluminum octahydrotriborate  973  
C2H14B3Ga  Dimethylgallium octahydrotriborate  974  



C2I4  Tetraiodoethene  975  
C2N  Carbocyanide radical  976  
C2N  Carboisocyanide radical  977  
C2NP  Phosphinidyne acetonitrile  978  
C2N2  Cyanogen  979  
C2N2  Isocyanogen  980  
C2N2O  Cyanogen isocyanate  981  
C2N2O2  Oxalonitrile di-N-oxide  982  
C2N2S  Sulfur dicyanide  983  
C2N4  Azodicarbonitrile  984  
C2O  Dicarbon monoxide  985  
C2O2  Carbon monoxide dimer  986  
C2O2S  Carbonyl sulfide  carbon monoxide(1/1)  987  
C2O2S2  Carbonyl sulfide dimer  988  
C2O3  Carbon monoxide - carbon dioxide (1/1)  989  
C2O3S  Carbonyl sulfide - carbon dioxide (1/1)  990  
C2O4  Carbon dioxide dimer  991  
C2Si  Silicon dicarbide  992  

