Abstract
The reaction of Schiff bases of dipropylenetriamine (dpt) with 2-thiophenecarboxaldehyde, 2-furaldehyde and pyrrol-2-carboxaldehyde with copper(II) salts in 1:2:1 molecular ratios, gave compounds of general formula [CuLX 2]; [L Schiff base of dipropylenetriamine with 2-thiophenecarboxaldehyde (dptSS), 2-furaldehyde (dptOO) and pyrrol-2-carboxaldehyde (dptNN) and X Cl, Br]. The compounds have been characterised by elemental analyses, molar conductance, magnetic, electronic and IR spectral studies. The X-ray crystal structure of the blue-gree [Cu(dptSS)Cl 2] has also been solved. Copper(II) is five coordinated with three CuN contacts [2.025(3) Å, 2.064(3) Å and 2.004(3)Å] from the tridentate dptSS and two contacts from chlorine atoms at distances 2.545(1) Å and 2.290(1) Å. The five donors form a distorted square pyramid which contains the N(1), N(2), N(3) and Cl(2) on the basal plane and Cl(1) on the apical position. The IR and the electronic spectra are in accordance with the established features of the structure. The molar conductivity indicates that the complexes are 1:1 electrolytes, while the magnetic moments are consistent with monomeric copper(II) units.
Published Version
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