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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11820

Title: Structure, characterization and photoreactivity of monomeric dioxovanadium(V) Schiff-base complexes of trigonal-bipyramidal geometry
Authors: ASGEDOM, G
SREEDHARA, A
KIVIKOSKI, J
KOLEHMAINEN, E
RAO, CP
Keywords: spectroscopic characterization
biological-systems
vanadium complexes
transition-state
chemistry
ribonuclease
biomolecules
alkoxide
ligands
binding
Issue Date: 1996
Publisher: ROYAL SOC CHEMISTRY
Citation: JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, (1), 93-97
Abstract: Five mononuclear cis-dioxovanadium(v) complexes of tridentate Schiff bases derived from salicylaldehyde and its derivatives and 8-aminoquinoline have been synthesized and characterized. Single-crystal X-ray analyses were performed with [VO(2)L(1)] 1 and [VO(2)L(2)] 2 (L(1) and L(2) denote the [1 + 1] Schiff-base anions derived from salicylaldehyde or naphthaldehyde and 8-aminoquinoline). While the structure of 2 was refined to a final R = 0.074(R' = 0.055), that of 1 was refined only to R = 0.134(R' = 0.134) due to its poor diffraction quality. The complexes contain cis-oxo groups in the equatorial plane and a trigonal-bipyramidal geometry around the vanadium at which the Schiff base binds meridionally. Photoirradiation of these complexes in CH2Cl2 yielded chloride-bound VO3+ species, as studied using absorption and V-51 NMR spectroscopy. These species are convertible back to the dioxovanadium(v) complexes upon addition of water to the photoirradiated solution.
URI: http://dx.doi.org/10.1039/dt9960000093
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11820
http://hdl.handle.net/10054/11820
ISSN: 0300-9246
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