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 = di-cyanamide) and [Cu(quin)2(dca)2]n 2 (quin = quinoline) were synthesized by self-assembly reactions of Zn(CH3COO)2·4H2O with Nadca and phen ligands, and CuCl2(2H2O 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, Mr = 377.67, monoclinic, space group P21/c, a = 10.1322(5), b = 11.0218(6), c = 14.1351(6) (A), β = 101.077(2)°, V = 1549.1(1) (A)3, Z = 4 , Dc = 1.619 g/cm3, μ(MoKα) = 1.602 mm-1, F(000) = 760, R = 0.0698 and wR = 0.1558; and for complex 2: (C22H14N8Cu)n, Mr = 453.95, orthorhombic, space group Cmc21, a = 16.679(4), b = 9.153(2), c = 12.937(3) (A), V = 1975.0(7) (A)3, Z = 4, Dc = 1.527 g/cm3, μ(MoKα) = 1.134 mm-1, F(000) = 924, R = 0.0486 and wR = 0.0981. The structures of complexes 1 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 π-π stacking interactions make the chains into a three-dimensional network in complex 1.