Cationic carbene complexes of palladium(II) and platinum(II)

Abstract

A series of cationic carbene complexes trans-[MX{C(NHR)NR′R″}(L)₂] ClO₄(M = Pd or Pt; X = H, Cl, or Br; R = Me, Ph, or p-NO₂C₆H₄; R′= H or Me; R″= Me, Et, Ph, or p-CH₃C₆H₄; L = PEt₃, PBuⁿ₃, PPh₃, PhNC, or p-NO₂C₆H₄NC) have been prepared and characterised. Certain platinum compounds may be converted, by treatment with KOH in alcohol, to the neutral amidino-complexes trans-[PtX{C(NHR)NR′}(PEt₃)₂](X = Cl or Br; R = Ph or p-NO₂C₆H₄; R′= Ph, Me, or Et). The i.r. and n.m.r. spectra of these compounds are recorded and used to assign configurations.