SYNTHESIS AND MOLECULAR-STRUCTURE OF [(PPH3)(C6CL5)BRPT(MU-BR)AG(PPH3)]2, A COMPOUND DISPLAYING STRONG AND WEAK AG=BR INTERACTIONS

By reacting (NBu4)[trans-PtBr2(C6Cl5)(PPh3)] with O3ClOAgPPh3 the title compound has been obtained. Its structure has been established by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P2(1)/n, with a = 14.399(2), b = 14.507(1), c = 20.446(1) angstrom, beta = 94.81(1)-degrees, V = 4256 angstrom 3 and Z = 4. Residuals are R = 0.040 and R(w) = 0.041. The 'PtBr2(C6Cl5)PPh3' and 'AgPPh3' fragments are bonded by a single bromide bridge Pt(mu-Br)Ag (Pt-Br(1) = 2.434(1), Ag-Br(1) = 2.606(1) angstrom) and two (PPh3)(C6Cl5)BrPt(mu-Br)Ag(PPh3) molecules are connected through two weak Ag...Br interactions (Ag...Br = 3.109(2) angstrom). A short contact between one omicron-chlorine atom of the C6Cl5 group and the silver atom is also present (Ag...Cl(5) = 3.007(3) angstrom).