Reactions of di- and tri-nuclear palladium and platinum isocyanide complexes with highly basic and bulky aromatic phosphines containing methoxy groups at the 2 and 6 positions
Abstract
Reactions of [M2(RNC)6]2+(M = Pd 1 or Pt 3)(R = 2,6-Me2C6H3) with L = tris(2,6-dimethoxyphenyl)phosphine, bis(2,6-dimethoxyphenyl)phenylphosphine or (2,6-dimethoxyphenyl)diphenylphosphine gave [M2(RNC)4L2]2+(M = Pd 2 or Pt 4). Reaction of the neutral complex [Pd2Cl2(RNC)4]5 with P[C6H3(OMe)2]3 gave [Pd2(RNC)4{P[C6H3(OMe)2]3}2]Cl26c. A similar reaction in the presence of NH4PF6 gave 2c{L = P[C6H3(OMe)2]3} and trans-[PdCl(RNC)2{P[C6H3(OMe)2]3}]+7c. Compound 7c was obtained from the secondary reaction of 2c with NH4Cl formed initially. The structure was confirmed by an X-ray analysis. The trinuclear complex [Pt3(RNC)8]2+ reacted with the phosphines to give corresponding [Pt3(RNC)6L2]2+. A similar reaction of [Pd3(RNC)8]2+ with PPh2[C6H3(OMe)2] or PPh[C6H3(OMe)2]2 produced the corresponding [Pd3(RNC)6L2]2+, whereas with P[C6H3(OMe)2]3 cleavage of metal–metal bonds occurred to give only 2c.
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