IUPAC - rotational constants (R05409)

rotational constants

https://doi.org/10.1351/goldbook.R05409

Coefficients of quantum numbers in the rotational term expression and inversely proportional to the principal moments of inertia. Symbols:

A

B

C

\tilde{A} = \frac{h}{8 π^{2} c I_{A}}

(dimension wavenumber),

A = \frac{h}{8 π^{2} I_{A}}

(dimension frequency) where

h

is the Planck constant and

c

the speed of light in vacuum.

Source:
Green Book, 2^nd ed., p. 23 [Terms] [Book]

Citation: 'rotational constants' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05409 RIS BibTex EndNote

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rotational constants