Electron-transfer platinum complexes of esters of dithiocarbazic acid. The crystal and molecular structure of [Pt{N(CH2Ph)NC(S)SMe}2]

Abstract

The ligand behaviour of the esters of dithiocarbazic acid NHRNHC(S)SR′ in intensely coloured complexes containing the doubly deprotonated ligands [Pt{NRNC(S)SR′}₂](R = H, R′= CH₂Ph; R = CH₂Ph, R′= Me or CH₂Ph; R = Prⁱ, R′= Me; R = hexyl, R′= Me or CH₂Ph) has been investigated by electronic, i.r., and ¹H n.m.r. spectroscopy and electrochemistry. The crystal and molecular structure of [Pt{N(CH₂Ph)NC(S)SMe}₂] has also been determined. All the complexes have a square-planar trans-PtN₂S₂ chromophore; they are dithiolene-like and show electron-transfer properties.