LINEAR CO-POLYMERIZATION OF TRANS-[PT(C(2)BU(T))(2)(PME(2)PH)(2)] WITH COPPER(I) CHLORIDE

Reaction of cis-[PtCl2(PMe(2)Ph)(2)] with the alkyne Bu(t)C(2)H and Et(2)NH in the presence of solid CuCl (> 0.35 mol/mol Pt) leads to the formation of colourless crystals of the compound trans-[{PtCu2Cl2(C(2)Bu(t))(2)(PMe(2)Ph)(2)}(n)]. 2n(MeCN) from acetonitrile solution for which the X-ray structure has been determined. The compound crystallises in the triclinic space group P $($) over bar$$ 1 with a = 9.505(4), b = 12.374(5), c = 15.970(2) Angstrom, alpha = 82.94(1), beta = 86.61(3), gamma = 77.98(2)degrees, V = 1822(1) Angstrom(3), Z = 2 (formula with n = 1). A linear polymeric structure is adopted which contains Pt(mu-sigma,eta(2)-C2BUt)Cu and Cu(mu-Cl)(2)Cu linkages. Several modes of alkyne-copper coordination have now been characterised with from one up to four alkyne groups coordinated to each copper atom.