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|Title:||Mixed ligand oxovanadium(IV) complexes with salicylic acid and N,N-bidentate ligands|
|Abstract:||Two mixed-ligand oxovanadium(IV) complexes VO(A)(B) [where H2A=salicylic acid and B=2,2'-bipyridine or 1,10- phenanthroline (hereafter, bipy and phen respectively)] have been synthesized and characterized by magnetic moment and spectral (IR, UV/VIS and EPR) data. The A2- ion acts as a bidentate dinegative ligand while B ligands act as a neutral bidentate. The magnetic susceptibility values indicate the existence of a small amount of anti ferromagnetic interaction. The vanadium atoms in the complexes are hexacoordinated and the coordination sphere is of the type [VO(OO)(NN)], where O atoms are of oxo, carboxylic and phenolic type and N atoms are of pyridine type. The sixth coordination site is occupied by phenolic oxygen of the neighbouring molccule forming a bridge. The vv=o confirms the hexacoordination. All the complexes have dxy1 type axial EPR spectra and they exhibit two ligand field transitions at 740 and 440 nm.|
|Appears in Collections:||IJC-A Vol.38A(06) [June 1999]|
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