Generalized coupled oscillator model for defect polymers. I. Calculation of frequency branches of n-paraffins, fatty acids and glymes

New repeat unit normal coordinates for the analysis of the defect polymer vibrational spectra are suggested. Relations between the valence force field for the GF-Wilson eigenvalue problem and the parameters of the generalized coupled oscillator model involving long-range interactions have been obtained separately for each mode. The results of the application of this model to most modes of finite chains (n-paraffins, fatty acids, and glymes) seem to be quite satisfactory. The applicability of the proposed model is discussed. © 1979.