PENTAFLUOROPHENYL TRINUCLEAR [PT2HG] AND HEXANUCLEAR [PT4HG2] ANIONIC COMPLEXES CONTAINING UNBRIDGED PT-HG BONDS AND OH BRIDGES

Two unprecedented reactions between (NBu4)2[Pt(C6F5)4] or (NBu4)2[Pt(mu-Cl)(C6F5)2]2 and Hg(NO3)2 lead to trinuclear (NBu4)2[(C6F5)3Pt(mu-OH)(mu-HgC6F5)Pt(C6F5)3] (1) or hexanuclear (NBU4)2[(mu-OH)2{C6F5)2Pt(mu-OH)(mu-HgCl)Pt(C6F5)2}2] (2), respectively. The structures of both complexes have been established by X-ray studies and contain OH bridges between each pair of platinum atoms and donor-acceptor Pt-->Hg bonds unsupported by any covalent bridges. The crystallographic parameters are as follows: 1: monoclinic, C2/c with a = 19.787(6), b = 21.495(6), c = 18.242(5) angstrom, beta = 96.18(3)-degrees, D(calc) = 1.948 g CM-3 for Z = 4 formula units and R = 0.037 utilizing 3090 data with F(o)2 greater-than-or-equal-to 3simga(F(o)2); 2: triclinic, P1BAR with a = 14.23(1), b = 17.81(2), c = 20.55(2) angstrom, alpha = 87.03(7), beta = 83.92(7), gamma = 83.46(5)-degrees, D(calc) = 2.129 g cm-1 for Z = 2 and R = 0.079 using 6507 reflections with F(o)2 greater-than-or-equal-to 2.5sigma(F(o)2).