Transition Metal Chemistry

, Volume 9, Issue 10, pp 372–376 | Cite as

Metal chelates of heterocyclic Nitrogen containing ketones. XV. Five-coordinate nickel(II) and copper(II) complexes with a sulphur-nitrogen tridentate schiff base

  • A. El-Dissouky
  • M. M. Abou-Sekkina
  • M. El-Kersh
  • Adel Z. El-Sonbati
Full Papers


Complexes of the Schiff base, 2-picolylphenylketone-hydrazine-S-benzyl dithiocarbazate, PPKBzTE, with nickel(II) and copper(II) halides have been prepared and characterized using spectral (1H n.m.r., i.r., uv-visible and e.s.r.) and magnetic measurements. A square pyramidal geometry is assumed for [Ni(PPKBzTE-H)X]2(X=Cl or. Br) and a square planar structure for [Ni(PPKBzTE-H)I]. The spectral studies in inert solvents show the presence of temperature dependent equilibria between tetrahedral and five-coordinate species in the chloro-and bromo-complexes. The interaction of nickel(II) complexes with various heterocyclic nitrogen Lewis bases yielded distorted octahedral 1∶2 adducts. Copper(II) complexes, [Cu3(PPKBzTE)(PPKBzTE-H)Cl5] and [Cu(PPKBzTE-H)Br]2 were separated and associated with a five-coordinate structure. Variable temperature magnetic susceptibility and the spectral studies showed that they are trimeric and dimeric, respectively.


Nickel Adduct Ketone Magnetic Susceptibility Schiff Base 
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Copyright information

© Verlag Chemie GmbH 1984

Authors and Affiliations

  • A. El-Dissouky
    • 1
  • M. M. Abou-Sekkina
    • 2
  • M. El-Kersh
    • 2
  • Adel Z. El-Sonbati
    • 2
  1. 1.Chemistry Department, Faculty of ScienceAlexandria UniversityAlexandriaEgypt
  2. 2.Chemistry Department, Faculty of ScienceTanta UniversityTantaEgypt

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