Spectral, magnetic studies and molecular orbital calculations for (4,5-dimethyl-3-pyrazolyl)aldazine copper(II) complexes

✍ Scribed by Mohamed K. Awad; Aziza K. Shehata; Ali EI-Dissouky

• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 596 KB
• Volume: 20
• Category: Article
• ISSN: 0340-4285
• DOI: 10.1007/bf00141515

✦ Synopsis

A new series of copper(II) complexes derived from (4,5dimethyl-3-pyrazolyl)aldazine (DMPA), formulated as: (a) [LCuX2]'nEtOH; (b) LCu(H20)2; and (c) I-LCuX]BF4.nH20, where n = 1/2 or 1, X = C1 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).