| MAITY, D., Jaromír MAREK, W. S. SHELDRICK, H. MAYER-FIGGE a M. ALI. Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands. Journal of molecular catalysis A:Chemical. ELSEVIER, 2007, roč. 270, 1-2, s. 153-159. ISSN 1381-1169. |
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@article{718189,
author = {Maity, D. and Marek, Jaromír and Sheldrick, W. S. and MayerandFigge, H. and Ali, M.},
article_number = {1-2},
keywords = {Aminebis(phenolate) ligands; Trigonal bipyramidal geometry; Catalytic oxidation; Toluene and xylenes; Hydroxo hydroperoxo intermediate},
language = {eng},
issn = {1381-1169},
journal = {Journal of molecular catalysis A:Chemical},
title = {Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands},
volume = {270},
year = {2007}
}
TY - JOUR
ID - 718189
AU - Maity, D. - Marek, Jaromír - Sheldrick, W. S. - Mayer-Figge, H. - Ali, M.
PY - 2007
TI - Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands
JF - Journal of molecular catalysis A:Chemical
VL - 270
IS - 1-2
SP - 153-159
EP - 153-159
PB - ELSEVIER
SN - 13811169
KW - Aminebis(phenolate) ligands
KW - Trigonal bipyramidal geometry
KW - Catalytic oxidation
KW - Toluene and xylenes
KW - Hydroxo hydroperoxo intermediate
N2 - The coordination chemistry of two aminebis(phenolate) ligands (H2L1 and H2L2) around vanadium(V)is described. Vanadium(V) oxo complexes (1, 2 and 3) of all the ligands were obtained readily by the reaction between the ligand precursors and [VO(acac)2]. Single crystal X-ray structure analysis showed that all of the complexes are penta-coordinated with trigonal bipyramidal geometry in NO4 coordination environment. The tripodal nitrogen atom of the respective ligands and monodentate alkoxo group occupy apical positions. These complexes structurally resemble very closely to the active sites of vanadium haloperoxidases (VHPO) and were found to catalyze the oxidation of toluene to benzoic acid and isomers of xylene to the corresponding hydroxy acids with turn over numbers ranging between 134 and 188. Based on mass spectra the mechanism of the catalytic process was proposed to proceed through the formation of hydroxo hydroperoxo intermediate, which is different from halo peroxidase reactions.
ER -
MAITY, D., Jaromír MAREK, W. S. SHELDRICK, H. MAYER-FIGGE a M. ALI. Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands. \textit{Journal of molecular catalysis A:Chemical}. ELSEVIER, 2007, roč.~270, 1-2, s.~153-159. ISSN~1381-1169.
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