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Bioinorganic Chemistry and Applications
Volume 2010, Article ID 178034, 7 pages
http://dx.doi.org/10.1155/2010/178034
Research Article

Zinc(II) and Nickel(II) Benzoate Complexes from the Use of 1-methyl-4,5-diphenylimidazole

1Department of Chemistry, University of Patras, 265 04 Patras, Greece
2Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus

Received 3 April 2010; Accepted 14 May 2010

Academic Editor: Evy Manessi-Zoupa

Copyright © 2010 Konstantina A. Kounavi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Two new complexes, [ Z n ( O 2 C P h ) 2 ( L ) 2 ] ⋅ 2 M e O H    ( 𝟏 ⋅ 2 M e O H ) and [ N i 2 ( O 2 C P h ) ) 4 ( L ) 2 ] ⋅ 2 M e C N    ( 𝟐 ⋅ 2 M e C N ) , have been synthesized and characterized by X-ray analysis in the course of an ongoing investigation of the M I I / X − / L [ M I I = C o , N i , C u , Z n ; X − = C l − , B r − , I − , N C S − , N O − 3 , N − 3 , P h C O − 2 ; L = 1 -methyl-4,5-diphenylimidazole] reaction system, aiming at understanding and assessing the relative strength and the way in which the intermolecular interactions control the supramolecular organization of these compounds. In the mononuclear complex 𝟏 ⋅ 2 M e O H , the benzoate ion acts as a monodentate ligand resulting in a distorted tetrahedral N 2 O 2 coordination environment. Complex 𝟐 ⋅ 2 M e C N exhibits a dinuclear paddle-wheel structure; each N i I I has a square pyramidal N i N O 4 chromophore with four benzoate oxygens in the basal plane and the pyridine-type nitrogen atom of one ligand L at the apex. The structure of 𝟏 ⋅ 2 M e O H is stabilized by intramolecular 𝜋 - 𝜋 interactions between aromatic rings of adjacent 4,5-diphenylimidazole moieties; it is a feature also evidenced in similar compounds of the type [ M X 2 L 2 ] .