Symmetric Tops attached to a Rigid Frame

Symmetric Tops attached to a Rigid Frame.—To a good approximation the rotational partition function of a molecule having several symmetric tops attached to a rigid frame may be expressed by  

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The tables of thermodynamic functions have been extended by Li and Pitzer to include internal rotation of symmetric tops having very low moments of inertia. These extended tables were calculated for two coaxial symmetric tops, though they are expected to apply to molecules containing symmetric tops attached to a rigid frame of any symmetry. 

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