Tetranuclear azido-bridged copper(II) complex [Cu4(μ-salpn)2(μ1,1-N3)2(N3)2(H2O)2]: Synthesis, characterization and crystal structure
摘要:
The reaction of salpnH(2) Schiff-base ligand (salpnH(2) = N,N'-bis(salicylidene)-1,3-propylenediamine) with Cu(NO3)(2)center dot 3H(2)O and a large excess of NaN3 (1:2:8 molar ration), lead to the formation of [Cu-4(mu-salPn)(2)(mu(1,1)-N-3)(2)(N-3)(2)(H2O)(2)] (1). which has been successfully obtained and characterized by elemental analyses, IR spectroscopy and single-crystal X-ray diffraction. The strong absorption band at about 2000-2100 cm(-1) and at 1597 cm(-1) regions of the IR spectrum of 1 clearly proves the presence of the both end-on (EO) bridging and terminal azido ions and C=N (azomethine) groups, respectively. Single-crystal X-ray analyses revealed that the copper atoms are bridged alternately by end-to-on (EO) azido and phenoxo-salpn ligands in the prepared tetranuclear copper(II) complex [Cu-4(mu-salpn)(2)(mu(1,1)-N-3)(2)(N-3)(2)(H2O)(2)] (C) 2009 Elsevier Ltd. All rights reserved.