Landolt-Brnstein Group II
: Molecules and Radicals
Volume 14 
Molecular Constants Mostly from Microwave, Molecular Beam, and Electron Resonance Spectroscopy 

Subvolume A Diamagnetic Molecules 
Introductory material 
1	
Introduction (J. DEMAISON) 1

2	
Constants of diamagnetic molecules 5

2.1	
Survey (E. TIEMANN) 5

2.2	
Diatomic molecules: Rotational and related constants (E. TIEMANN) 5

2.3	
Linear molecules: Rotational and related constants (J. DEMAISON) 37

2.4	
Symmetric top molecules: Rotational and related constants (J. DEMAISON) 63

2.5	
Asymmetric top molecules: Rotational and related constants (J. DEMAISON) 128

Inorganic molecules 131

Methane, ethane, propane derivatives 175

Aliphatic molecules with double and triple carbon-bonds 326

Elemento-organic compounds 382

Elements with two or three internal rotors 415

Saturated cyclic compounds 425

Unsaturated cyclic and aromatic compounds 483



2.6	
Dipole moments 584

Diatomic molecules (E. TIEMANN) 584

Linear and symmetric top molecules (J. DEMAISON) 590

Asymmetric top molecules (J. DEMAISON) 598



2.7	
Quadrupole coupling constants 644

Diatomic molecules (E. TIEMANN) 644

Linear and symmetric top molecules (J. DEMAISON) 654

Asymmetric top molecules (J. DEMAISON) 669



2.8	
Hindered rotation (J. DEMAISON, A. DUBRULLE) 717

C-C bonds 719

C-Si and C-Ge bonds 730

C-O bonds 734

C-S and C-Se bonds 738

C-N and C-P bonds 741

Other bonds 743



2.9	
Magnetic constants 745

Diatomic molecules (E. TIEMANN) 745

Linear and symmetric top molecules (W. HTTNER) 755

Asymmetric top molecules (W. HTTNER) 772

References 
Appendix: Additions to Chapter 2



Index of substances (See Vol. 14B) 
