摘要:
The novel mononuclear complex [Cu(teec)(2)(NO3)(2)] with teec = 1-(2-chloroethyl)tetrazole, has been prepared from 1 equiv. copper(II) nitrate with 2 equiv. of teec. The X-ray structure shows the formation of a mononuclear complex with hexa-coordinated copper(II) ions. The teec ligands are positioned in trans orientation with a distorted axial geometry. Two of the Cu-O bonds of the chelating nitrate anions are significantly longer than the other two Cu-O bonds (1.99 vs. 2.48 Angstrom). Linear-chain packing of the mononuclear units is reflected in very weak, linear ferromagnetic chains with theta = 0.30 K and C = 0.44 cm(3) K mol(-1). The spectral properties are in accord with the structural and magnetic data. (C) 2003 Elsevier Science B.V. All rights reserved.