Answers are grounded in this paper and cite their sources.
The Q-sum corresponding to La Coste's eigenvalues for the rotational levels of tetramethylmethane has been expressed by the usual asymptotic expansion. The relatively large coupling terms between the various rotations cancel almost exactly in the Q-sum, so that the thermodynamic functions are scarcely affected by the coupling.
No takes yet. Share an insight, caveat, or question.
Louis S. Kassel (1935) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: