List of tabulated rotational parameters

C Rotational constants, in units of frequency (mostly MHz) or wave number (cm ) their value slightly depends on the reduction used which is specified by the notation of the centrifugal distortion constants, see eqs. (2.2), (2.3). 

H Centrifugal Distortion constants, in units of frequency (mostly kHz) or wave number (cm ) Unreduced constants 

4 Reduced constants Watson parameters in the symmetric top reduction [77Wat], see eq. (2.3). Note that they are different from Nielsen s umeduced parameters athough the same notation is used. 

4 Remarks concerning the previous columns, and values of constants which have been determined only for a few molecules of this table  

In a few cases, terms appear which are not defined here. The reader is then referred to the original literature, but he can draw information about the parameter s significance from the reported experimental errors. 

All parameters of a given molecule are listed separately for each ro-vibrational (or sometimes vibronic) state. 

Different from the previous volumes all kinds of parameters - rotational, hfs, hindered internal rotation, coupling to external electric and magnetic fields - are collected in one table below, molecule by molecule. The molecules are ordered via a ramring number, according to Hill s system which is explained in the General Introduction above. 

Running number, gross formula, and Chemical Abstracts registry nrunber appear in the first line of each entry, followed in the second line by references to previous volrunes if applicable. Then a list of symbols of all parameters collected for the molecule under consideration is given for a short overview, and at the very right of this line a structural formula of the moleeule is provided. In the ease of a van der Waals complex the mutual orientation of the constituents can normally be obtained from a rough drawing. Important characteristics of a molecule may be commimicated by plain text. 

Note that units of quantities within columns are not repeated when they do not ehange. Thus, the unit appearing in the first row remains valid for the following rows of the eolunm until it ehanges, and then the new unit is written explicitly and holds until it may vary agaim 

Numerical values (numbers and units) will be listed for the following rotational parameters which have been introduced, in their physical context, in the former seetion  

1 1 vibrational angular momentum quantum number in excited degenerate vibrational states 

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For an introduction into the revised structure of the tables in the present volume II/29. see section 2.1.2, "List of tabulated rotational parameters" above. The parameters of a given molecule are listed separately for each isotopologue and each vibrational state. Within this gross order, the hfs interaction constants are placed imdemeath the rotational parameters in columns 2 and 3. The following syrmnetric top hfs parameters are tabulated ... 

List of tabulated symmetric-top internal-rotation parameters... 

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