ORGANOMETALLIC DERIVATIVES OF PALLADIUM, PLATINUM, AND GOLD

Information obtained in my and other research groups on halo carbonyls of palladium, platinum, and gold are surveyed. While for platinum(II), all the three halo (Cl, Br, I) complexes are well established both in solution and in the solid state for the PtX2(CO)2, Pt2X4(CO)2 and [PtX3(CO)]- series, the bromo derivatives of palladium(II) and gold(I) are stable only in solution, under carbon monoxide. No evidence for the existence of iodo carbonyl derivatives of palladium(II) and gold(I) has been observed. The sigma-component of the M-CO bond appears to predominate.