SOLID-STATE STRUCTURES OF (R3P)2PTX2 COMPLEXES AS DETERMINED BY A COMBINATION OF C-13(H-1) AND P-31(H-1) NMR-SPECTROSCOPY

Cross-polarization, combined with magic-angle spinning, has been employed to obtain high-resolution solid-state 13C and 31P NMR spectra of a series of 31 (R3P)2PtX2 complexes. These data together with spectra obtained in solution were used to compare the solid-state structures with those in solution. It was found that most of these complexes, which have regular square-planar structures in solution, are distorted in the solid state. The extent of the solid-state distortion is a function of the bulk of the coordinated ligands and increases as the ligand size increases. The solid-state distortions appear to result from intramolecular steric effects for cis-(R3P)2PtX2 and probably from intermolecular crystal packing forces for trans-(R3P)2PtX2. © 1990, American Chemical Society. All rights reserved.