Knowledge Bank

“The infrared and Raman spectrum of distorted n-paraffins is investigated theoretically. The deviations from the straight chain are assumed to be of the simple type which can be fully described by the number of gauche connections between neighbouring $CH2$ groups. For the case of chains which contain only one such connection, intensity formulas are obtained by perturbation methods. One finds that the number of active fundamentals per chain is not affected by the distortion. The bearing of this result on the spectroscopic investigation of rotational isomers is discussed.”