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 ....................................... 17

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

2 
Inorganic molecules ................................... 27



Lando lt-B rnst ein New Series II/25 
