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Mathematical treatment of characteristic stretching frequency shifts of diatomic groups in the case of transition from vapour to the fluid phase. The shift is a sum of a dispersion forces term and a dipole orientation term. The derived formula is in qualitative agreement with experimental data found by other authors.

Veränderungen charakteristischer Valenz-Frequenzen zweiatomiger organischer Gruppen beim Übergang vom Dampf in die flüssige Phase