The structure of ac-dichloro-b-ethylene-d-pyridineplatinum(II) from hydrogen-1 and -2 nuclear magnetic resonance spectra of liquid-crystal solutions

Abstract

A ¹H n.m.r. spectrum of the complex [PtCl₂(C₂H₄)(NC₅D₅)] has been obtained by decoupling of the spin coupling to deuterium for samples dissolved in thermotropic liquid crystals. The dipolar couplings have been used to obtain the relative positions of the protons and platinum. The quadrupole splittings observed in the ²H n.m.r. spectra are used in conjunction with the order parameters derived from the proton spectra to show that the equilibrium structures have the pyridine ring inclined at an angle to the PtCl₂ plane, with rapid reorientation between the symmetry-related forms.