Syntheses and crystal structures of two novel 1-D metal complexes with dicyanamide:: [Zn(pheen)(dca)2]n and [Cu(quin)2(dca)2]n

The two complexes [Zn(phen)(dca)2](n) 1 (phen = 1,10-phenanthroline, dca = dicyanamide) and [Cu(quin)(2)(dca)(2)](n) 2 (quin = quinoline) were synthesized by self-assembly reactions of Zn(CH3COO)(2).4H(2)O with Nadca and phen ligands, and CuCl2.2H(2)O with Nadca and quin ligands, respectively. Their crystal structures were determined by single-crystal X-ray diffraction analyses. Crystallographic data for complex 1: (C16H8N8Zn)(n) M-r = 377.67, monoclinic, space group P2(1)/c, a = 10.1322(5), b = 11.0218(6), c = 14.1351(6), beta = 101.077(2)degrees, V = 1549.1(1) Angstrom(3), Z = 4, D-c = 1.6199/cm(3), mu(MoKalpha) = 1.602 mm(-1), F(000) = 760, R = 0.0698 and wR = 0.1558; and for complex 2: (C22H14N8Cu)(n), M-r = 453.95, orthorhombic, space group Cmc2(1), a = 16.679(4), b = 9.153(2), c = 12.937(3) Angstrom, V = 1975.0(7) Angstrom(3), Z = 4, D-c = 1.527 g/cm(3), mu(MoKalpha) = 1.134 mm(-1), F(000) = 924, R = 0.0486 and wR = 0.0981. The structures of complexes I and 2 consist of infinite zigzag chains, and their metal atoms have slightly distorted square pyramidal coordination environments with two N atoms of phen or quin ligands and three nitrile N atoms of dca ligands. The secondary long Zn-N bonds and pi-pi stacking interactions make the chains into a three-dimensional network in complex 1.