Mononuclear, dinuclear and polymeric 1D thiocyanato- and dicyanamido–copper(II) complexes based on tridentate coligands
作者:Salah S. Massoud、Ashley E. Guilbeau、Hang T. Luong、Ramon Vicente、Jörg H. Albering、Roland C. Fischer、Franz A. Mautner
DOI:10.1016/j.poly.2013.01.033
日期:2013.4
Three mono-nuclear copper(II) complexes: [Cu(mpipy)(NCS)(2)] (1); [Cu(mpiq)(NCS)(2)] (2); [Cu(bdmpzpy) (dca)(2)(H2O)] (4) a dinuclear, [Cu-2(dmenim)(2)(mu(1.3)-NCS)(2)](ClO4)(2) (3) and a linear 1D [Cu(mpiq)(mu(1.5)-dca)]ClO4}(n) (5) complex were synthesized using a variety of tridentate amine ligands (mpipy = N-methyl-N-(2-pyridylmethyl)piperazine; mpiq = N-methyl-N-(2-quinolylmethyl)-piperazine); bdmpzpy = 2,6-bis[(2,5-dimethyl-1H-pyrazolyl)methyl]pyridine; dmenim = Schiff base condensation of N,N-dimethylethyl-enediamine and imidazole-4(5)-carboxaldehyde). The complexes were characterized by spectroscopic techniques and by single crystal X-ray crystallography. The N-thiocyanato mode of bonding in 1 and 2, the terminal monodentate nitrile-dca bonding in 4, and the bridging modes mu 1,3-SCN in 3 and mu 1,5-dca in 5 as well as the distorted square pyramidal geometries around the central Cu(II) ions in compounds 1-3 and 5, and distorted octahedral in 4 were confirmed. The magnetic susceptibilities of compounds 3 and 5, investigated at variable temperature (2-300 K), revealed their weak antiferromagnetic coupling nature. (C) 2013 Elsevier Ltd. All rights reserved.