Counter-anions and their coordination behavior with Cu(II) complexes of thiophen-3-yl-dipicolylamine
作者:Ana de Bettencourt-Dias、Vanessa J. Scott、Steven Hugdal
DOI:10.1016/j.ica.2010.08.018
日期:2010.11
A new ligand, 1-(pyridin-2-yl)-N-(pyridin-2-ylmethyl)-N-(thiophen-3-ylmethyl) methanamine, ThDPA, was synthesized, as a new example of an N3S donor. Cu(II) complexes of this ligand were isolated. When Cu(NO3)(2) was used as the metal source, a homobinuclear complex with the formula [CuThDPA(NO3)(2)](2)center dot H2O, 1, with two different types of nitro coordination was isolated. 1 crystallizes in the monoclinic P2(1)/n space group with a = 15.193, b = 8.181, c = 32.827 angstrom, beta = 103.3 degrees and V = 3971.9 angstrom(3). In the case of CuSO4 as the source of copper(II), uncommon sulfato-bridged structures were isolated. The homobinuclear complex crystallized in two different lattices, depending on the solvent evaporation rate. Compound 2, with the formula [CuThDPA(SO4)](2)center dot 3H(2)O, crystallizes with 3 water molecules per binuclear structure in the monoclinic space group P2(1)/c with a = 10.143, b = 17.013, c = 11.793 angstrom, beta = 97.18 degrees and V = 2019.1 angstrom(3), and 3, [CuThDPA(SO4)](2)center dot 4H(2)O, crystallizes with 4 water molecules per binuclear structure in the triclinic P (1) over bar space group, with a = 9.2906, b = 10.7297, c = 12.7236 angstrom, alpha = 79.66, beta = 72.18, gamma = 67.1 degrees and V = 1109.7 angstrom(3). (C) 2010 Elsevier B.V. All rights reserved.