Spectral,magnetic studies and molecular orbital calculations for (4,5-dimethyl-3-pyrazolyl)aldazine copper(II) complexes |
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| Authors: | Mohamed K Awad Aziza K Shehata Ali EI-Dissouky |
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| Institution: | (1) Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt;(2) Chemistry Department Makkah Al-Mukarramah, Umm Al-Qura University, PO Box 3711, Makkah, Saudi Arabia;(3) Chemistry Department, Faculties of Education and Science, Alexandria University, Alexandria, Egypt |
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| Abstract: | Summary A new series of copper(II) complexes derived from (4,5-dimethyl-3-pyrazolyl) aldazine (DMPA), formulated as: (a) LCuX2]·nEtOH; (b) LCu(H2O)](ClO4)2; and (c) LCuX]BF4·nH2O, where n = 1/2 or 1, X = Cl or Br and L = DMPA, have been synthesized. The formulations are based on elemental analyses and molar conductivity data. I.r., u.v.-vis., e.s.r. and magnetic data reveal that the complexes are trigonal bipyramidal, tetrahedral and stacked square-planar structures for (a), (b) and (c), respectively. The trigonal bipyramidal structure for class (a) compounds is confirmed using the atom superposition and electron delocalization-molecular orbital calculations, which agree with the experimental electronic spectral data. Variable temperature magnetic susceptibility data shows a ferromagnetic interaction within copper(II) complexes of class (c). |
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