Synthesis and properties of the chain-like polymeric copper(II) complexes bridged by bis(diphenylphosphino oxide)ethane

At room temperature, the chain-like polymeric copper(II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO(2)), [Cu(dppeO(2))X-2](n)[X = Cl(1), Br(2)] have been prepared and characterized by elemental analysis, P-31 NMR, TG-DTA and X-ray analysis for [CuBr2(dppeO(2))](n). The chain is composed of subunits containing tetrahedron coordinated copper(II) atoms. The four-coordinated copper(II) atom is ligated to another four-coordinated copper(II) atom through dppeO(2). The coordination sphere of copper(II) at om is completed by two monodentate bromide and two oxygen atoms from bridgi ng dppeO(2). Crystal data are as follows: C-26- H24CuP2Br2O2, 0.50 mm x 0.4 0 mm x 0.40 mm, monoclinic, space group: C-2/c, lambda = 0.07107 nm(Mo K-al pha), a = 1.2286(2) nm, b =2.0555(8) nm, c = 1.0652(2) nm, beta = 97.366(9) degrees, V = 2.668 nm(3), Z = 4, D-calc = 1.628 g . cm(-3) R = 0.066; R-w = 0.091.