Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F07%3A00022069" target="_blank" >RIV/00216224:14310/07:00022069 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands
Original language description
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.
Czech name
Syntéza, krystalové struktury a katalytická oxidace aromatických uhlovodíků vanadičnými komplexy s amino-bis-phenolátovými ligandy
Czech description
Článek popisuje koordinaci dvou amino-bis-phenolátových ligandů (H2L1 a H2L2) vanadičnaným iontem. RTG strukturní analýza prokázala, že vzniklé komplexy jsou penta-koordinované s geometrií trigonální bipyramidy. Komplexy jsou velmi podobné aktivnímu centru vanadičnaté haloperoxidázy (VHPO) a bylo prokázáno, že jsou schopny oxidovat např. toluen či xylen. Hmotnostní spektroskopie ukazuje, že mechanismus této katalýzy pravděpodobně probíhá přes jiný hydroxo hydroperoxo meziprodukt než při reakci katalyzované VHPO.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of molecular catalysis A:Chemical
ISSN
1381-1169
e-ISSN
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Volume of the periodical
270
Issue of the periodical within the volume
1-2
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
153-159
UT code for WoS article
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EID of the result in the Scopus database
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