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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(11) [November 2011] >
| Title: | Synthesis, characterisation and catalytic activities of vanadium complexes containing ONN donor ligand (E)-4-[(2-(dimethylamino)ethylimino] methyl-5-(hydroxymethyl)-2-methylpyridin-3-ol |
| Authors: | Maurya, Mannar R
Bisht, Manisha
Avecilla, Fernando |
| Keywords: | Coordination chemistry
Encapsulated compounds
Catalysts
Oxidation
Oxidovanadium
ONN ligands |
| Issue Date: | Nov-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Reaction between [VIVO(acac)2]
and the ONN donor ligand
(E)-4-[(2-(dimethylamino)ethylimino]methyl-5-(hydroxymethyl)-2-methylpyridin-3-ol
(Hpydx-dmen) results in the formation of the complex [VIVO(acac)(pydx-dmen)]
(1). In (1), the vanadium
center adopts a distorted six-coordinated octahedral geometry where the ligand
coordinates through one O and two N atoms; the oxo and two Oacac
atoms complete the coordination sphere. The poorly stable oxidoperoxidovanadium(V)
complex [VVO(O2)(pydx-dmen)] (2) has been prepared by the treatment of (1) with aqueous
30 % H2O2. Its
formation has also been demonstrated in solution by treating (1) with H2O2
in methanol. Treatment of the ligand with vanadium(IV)–exchanged zeolite-Y
followed by aerial oxidation gives the dioxidovanadium(V) complex encapsulated
in the nano-cavity of zeolite-Y, [VVO2(pydx-dmen)]-Y (3).
The encapsulated complex, [VVO2(pydx-dmen)]-Y (3),
catalyses the oxidation of styrene, methyl phenyl sulfide, diphenyl sulfide and
cyclohexene using H2O2 as oxidant in good yield. |
| Page(s): | 1562-1573 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(11) [November 2011]
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