Oxovanadium(IV) complexes containing bidentate Schiff-base ligands: synthesis and structural and spectroscopic data
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 139-144
- https://doi.org/10.1039/dt9770000139
Abstract
The synthesis and properties of some oxovanadium(IV) complexes, [VOL2], containing N-substituted salicylal-dimines (L) are reported. An unusually low VO stretching frequency (–1) has been observed when R = C6H4Cl-4 and C6H4NO2-4. This reduction in frequency has previously been attributed to polymerisation of the VO unit, however the present crystal-structure analysis shows that bis[N-(4-chlorophenyl)salicylideneiminato]oxovanadium(IV) is monomeric in the solid state. The co-ordination polyhedron, which in the crystal has C2 symmetry, is based on a distorted trigonal bipyramid. The three oxygen and vanadium atoms are in the equatorial plane and the two nitrogen donors occupy axial positions. The vanadium–oxygen bond length (1.615 Å) is among the largest found in oxovanadium complexes.Keywords
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