Die (C—H)-Valenzfrequenz chlorierter Alkane und Grundeffekte der zwischenmolekularen Wechselwirkung. Orientierung der Bindungspolarisation in der aliphatischen (C—H)-Gruppe

Abstract

The (C—H)-stretching frequency shifts of chlorinated Alkanes observed in dipolar and proton acceptor solvents are qualitatively explained as sums of the dispersion forces shift, the dipole orientation shift, and the H-bridge shift. A connection is found between the sign of the (C—H) bond moment derivative ∂μ/∂r and the magnitude of the bond polarization. The assumption that the positive end of bond polarization of aliphatic (C—H)-groups is oriented toward the hydrogen atom, is experimentally proven.