List of tabulated symmetric-top internal-rotation parameters

3 List of tabulated symmetric-top internal-rotation parameters 

For an introduction into the revised structure of the tables in the present volume 1129, see 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 internal-rotation interaction constants are placed underneath the rotational parameters in columns 2 and 3, usually before the hfs parameters and external-field parameters. The following quantities extracted from the internal rotation fine stracture of symmetric-top molecular spectra can be found tabulated (See also the List of tabulated asymmetric top internal-rotation parameters in the next subvolume)  

V hindering potential, in units of energy (cal/mol, kJ/mol) or wave number (cm ) 

Via) hindering potential (torsional potential) as a function of the torsional angle a [59Lin, 68Dre] Via) = Na) N 2 

Vn Fourier expansion coefficient of the hindering potential Via). In most cases simply called the hindering potential, when only the coefficient with the smallest N is given [59Lin, 68Dre, 84Gor]. 

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