Synthesis, Crystal Structure and Photoluminescent Properties of a New Dinuclear Copper(I) Complex [Cu2(μ2-dppm)2(MeCN)2(μ2-MeCN)](ClO4)2•MeCN

The title compound [Cu-2(mu(2)-dppm)(2)(MeCN)(2)(mu(2)-MeCN)](ClO4)(2)center dot MeCN (dppm = bis(diphenylphosphino)methane) has been prepared and characterized. It crystallizes in the monoclinic system, space group P2(1)/n, with a = 11.904(6), b = 20.755(11), c = 24.744(13) angstrom, beta = 98.226(12)degrees, C58H56Cl2Cu2N4O8P4, M-r = 1258.93, V = 6051(5) angstrom(3), Z = 4, D-c = 1.382 g/cm(3), mu = 9.52 mm(-1), F(000) = 2592, R = 0.0533 and wR = 0.1295 for 6175 observed reflections with I > 2 sigma(I). Each Cu(I) center is tetrahedrally coordinated by two phosphine atoms from two bridging dppm ligands, one nitrogen atom from a terminally coordinated acetonitrile molecule, and another nitrogen atom from a mu(2)-acetonitrile molecule. The two Cu(I) centers are bridged by two dppm ligands as well as a unique acetonitrile molecule. The full molecule exhibits a 'chair-like' configuration. This dinuclear complex exhibits intense or middle photoluminescence at room temperature in the solid state or actonitrile solution at 486 nm.