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.