A comparative study of platinum di(t-butyl)(15N2)diimine) and trans-[PtCl2(N-ligand)PBu3)] complexes by 195Pt-, 31P- and 15N-NMR

Abstract

195Pt-, 31P- and 15N-NMR. data are presented for [PtCl2 (t-Bu 15NCHCH15N (t-Bu)) (2-styrene)] (1), trans-[{PtCl2 (PBu3)}2 (t-Bu 15NCHCH15N (t-Bu))] (2), trans-[PtCl2 (t-Bu 15NCHCH15N (t-Bu)) (PBu3)] (3) and various complexes of the type trans-[PtCl2 (N-ligand) (PBu3)]. In solution the gross structural features of 1 and 2 are shown to be in agreement with those found in the solid state; namely, 1 contains five-coordinate Pt and 2 is dinuclear. In 3 Pt is four-coordinate with only one N-atom of the diimine ligand being coordinated at -50° in CD2Cl2. The NMR. data for 2 and 3 are compared with those of trans-[PtCl2 (N-ligand) (PBu3)] (N-ligand = pyridine, 2, 6-dimethylpyridine, (15N)-hexylamine, (15N)-t-butylamine and (15N)-aniline) and are discussed in terms of the donor and acceptor properties of the N-ligands.