Study of the co-ordination behaviour of the thiocyanate and cyanate ions in some platinum(II) complexes by heteronuclear resonance spectroscopy

Abstract

The isomers present in solutions of [Pt(CNS)₂L₂](L = NMe₃, PMe₃, PMe₂Et, PMeEt₂, PEt₃, AsMe₃, AsMe₂Et, AsMeEt₂, AsEt₃, SbMe₃, SMe₂, and SeMe₂) have been identified by ¹H-{¹⁹⁵Pt} INDOR and ³¹P n.m.r. measurements. The mode of co-ordination of the thiocyanate ion is shown to be sensitive to the size of the cis ligands. Some related cyanate complexes have been prepared and are shown to be entirely N-bonded. Some representative infrared and Raman spectra are reported and the shortcomings of such measurements as a means of establishing stereochemistry are discussed.