A novel triple-stranded cadmium(II) polymer chain:catena-poly[cadmium(II)-μ-1,2-bis(imidazol-1-yl)ethane-κ²N³:N^3′-di-μ-1,5-dicyanamido-κ⁴N¹:N⁵]

Abstract

In the crystal structure of the title complex, [Cd(C2N3)2(C8H10N4)]n or [Cd(dca)2(bim)]n, where dca is dicyanamide and bim is 1,2‐bis­(imidazol‐1‐yl)ethane, each CdII atom is in a distorted octa­hedral environment. Four N atoms from four dca ligands occupy the equatorial positions, and two N atoms from two bim ligands occupy the axial positions. Each CdII atom is situated at a center of symmetry, and a twofold axis runs through the mid‐points of the bim exocyclic C—C bond and the Cd⋯Cd vector. The structure consists of chains in which neighboring CdII atoms are connected through one bim and two end‐to‐end dca bridges.

Syntheses and structures of three zinc coordination polymers with 1-D zigzag chain, double chain, and triple chain

“…Neighboring Zn(II)'s locate on the same C 3 -axis and connect to other Zn(II) atoms by three btp ligands. The three strands of btp are wrapped around each other, held together by zinc, forming a triple chain [30,31] structure along the c-axis. The Zn Á Á Á Zn distances separated via the bridging btp are 7.620 Å , corresponding to half of c-axis translation and obviously shorter than The btp ligands exhibit anti-gauche, anti-anti, and gauche-gauche conformation in 1, 2, and 3, respectively.…”