Synthesis and crystal structure of a polymeric cobalt(II) complex with 1,2-bis(1,2,4-triazol-1-yl)ethane

The title complex [Co-2(bte)(3)(NCS)(4)(H2O)(2)] (n) (bte = 1,2-bis(triazol-1-yl)ethane) has been prepared. Single-crystal X-ray analysis reveals that the complex crystallizes in space group P (1) over bar with a = 7.7962(2), b = 8.3407(4), c = 14.7735(5) angstrom, alpha = 86.835(2), beta = 76.2031(9), gamma = 80.583(3)degrees. The crystal consists of two discrete complexes, [Co(bte)(NCS)(2)(H2O)(2)] and [Co(bte)(2)(NCS)(2)]. The structure of [Co(bte)(NCS)(2)(H2O)(2)] consists of neutral chain containing Co(II) bridged by bte molecules. The six-co-ordination of Co2+ is achieved by means of two trans NCS- ions and water molecules. The structure of [Co(bte)(2)(NCS)(2)] demonstrates a one-dimensional neutral chain through bte-bridge, in which the Co(II) atom is in a distorted octahedral environment formed by four nitrogen atoms of the triazoles and two nitrogen atoms from two trans thiocyanato liagnds.