Metal–β-diketone complexes. Part III. Metal derivatives of some platinum–carbon bonded acetylacetone complexes

Abstract

The ions [Pt(acac)₂X]^–(X = Cl, Br) reacts with a variety of bivalent metal salts to give the complexes M[Pt(acac)₂X]₂(M²⁺= Mn, Fe, Co, Ni, Cu, Zn, Cd, Pd, VO, or UO₂). The first seven members comprise an isomorphous series for both chloro- and bromo-complexes. The n.m.r. spectra of the zinc and cadmium complexes indicate that the ligand groups [Pt(acac)₂X]^– are maintained and still contain the platinum–carbon-bonded acetylacetone group. From the infrared spectra, the co-ordination of the halogeno-bisacetylacetonatoplatinum(II) ions occur via the carbonyl oxygens of the carbon-bonded acetylacetone. The magnetic behaviour over a temperature range and spectra of the nickel and cobalt salts indicate that the complexes are octahedral in stereochemistry. The ligand is considered to bond as a terdentally via two oxygens and a halogen atom.

The complexes M[Pt(acac)₃]₂(M²⁺= Mn, Fe, Co, Cu, Cd, or Pd) have also been prepared and shown to involve bonding by some of the carbonyl of the platinum–carbon-bonded acetylacetone groups. A similar bonding pattern is also found in the complex Cd[Pt(acac)₂Cl₂].