Crystallographic and nuclear magnetic resonance studies of carbonyl(η³-methylallyl)(trichlorostannyl) complexes of platinum(<scp>II</scp>) and palladium(<scp>II</scp>)

Abstract

The complexes [M(η3-C4H7)(SnCl3)(CO)][C4H7= 2-methylallyl, M = Pt(1) or Pd(2)] have been prepared and characterized. Their solution behaviour has been studied by n.m.r. spectroscopy, the compounds being dynamic through dissociation of the CO ligand. The X-ray structures of (1) and (2) are reported. Complex (2) is the first mononuclear palladium carbonyl to be characterized by X-ray diffraction. The different stabilities of the two isostructural complexes are correlated with the subtle differences in bonding observed in the crystal structures.