New Dimetallic Palladium and Platinum Complexes Containing the Tetrakis(1-pyrazolyl)borate Ligand − Crystal Structures of [{(C6F5)2Pd}2(μ-pz)2B- (μ-pz)2], [{(C6F5)(tBuNC)Pd}2(μ-pz)2B(μ-pz)2]+ and [(C6F5)2Pd(μ-pz)2B(μ-pz)2Pd(η3-C4H7)]

Abstract

New dimetallic palladium and platinum complexes containing the tetrakis(pyrazol-1-yl)borate ligand of the type [{(C6F5)2M}2(μ-pz)2B(μ-pz)2]− (M = Pd, Pt), [{(C6F5)(L)Pd}2(μ-pz)2B(μ-pz)2]+ (L = CNtBu, NCPh, PR3, AsR3) and [{(C6F5)(Cl)Pd}2(μ-pz)2B(μ-pz)2]− have been prepared using the benzonitrile complexes cis-[(C6F5)2M(NCPh)2] (M = Pd, Pt) or the halide bridged complexes [{(C6F5)LPd(μ-X)}2] (L = CNtBu, NCPh, PR3, AsR3, tht; X = Cl or Br), and [B(pz)4]− as starting materials. The monometallic [(C6F5)(tBuNC)Pd(μ-pz)2B(pz)2] and the asymmetric dinuclear [(C6F5)2Pd(μ-pz)2B(μ-pz)2Pd(η3-C4H7)] complexes have also been prepared. The crystal structures of [{(C6F5)2Pd}2(μ-pz)2B(μ-pz)2]−, [{(C6F5)(tBuNC)Pd}2(μ-pz)2B(μ-pz)2]+ and [(C6F5)2Pd(μ-pz)2B(μ-pz)2Pd(η3-C4H7)] have been established by X-ray diffraction. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)