| Abstract |
Four new heterometallic Cu(II)/Cr(III) complexes with N,N-dimethylethylenediamine (dmen) and its novel Schiff-base derivatives, N -[(1Z)-3-amino-1,3-dimethylbutylidene]-N,N-dimethylethane-1,2-diamin e (dmenac) and N -((1Z)-3-\[2-(dimethylamino)ethylamino)-1,3-dimethylbutylidene)-N,N -dimethylethane-1,2-diamine (dmen(2)ac), have been easily prepared by self-assembly and characterized by spectroscopic methods and single crystal X-ray analysis. The structures of all the complexes are assisted by numerous hydrogen bonds that provide a web of interactions and mould the supramolecular architectures of the compounds. Variable-temperature (1.8-300 K) magnetic susceptibility measurements reveal Curie-Weiss paramagnetic behavior of all the compounds, supported by EPR studies. (C) 2009 Elsevier Ltd. All rights reserved. |
