Mechanisms of Oxidant Activation in Alkene Epoxidation Catalyzed by Monosubstituted Heteropolytungstates Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
||
|---|---|---|---|
| Output data | Year: 1997, Volume: 38, Number: 4, Pages: 507-512 Pages count : 6 | ||
| Tags | MOLECULAR-OXYGEN; ORGANIC HYDROPEROXIDES; ALKYLPEROXO COMPLEXES; MANGANESE-PORPHYRINS; ALKYL HYDROPEROXIDES; OXIDATION CATALYSTS; OLEFIN EPOXIDATION; HYDROCARBONS; SYSTEM; METALLOPORPHYRINS | ||
| Authors |
|
||
| Affiliations |
|
Abstract:
The catalytic activity of monosubstituted heteropolytungstates PW11MOn-39 (PW11M; M = Co(II), Mn(II) Cu(II), Ti(IV), Ru(IV), V(V), Nb(V)) was studied in alkene oxidations by various oxidants (tert-butyl hydroperoxide, iodosobenzene, and dioxygen) in the presence of isobutyraldehyde (IBA). Activity series of PW11M were found to be different for the oxidants studied. The composition of reaction products depends on the alkene structure and the nature of oxygen donor. The radical-chain mechanism was proven for the reactions of alkenes with t-BuOOH and O2/IBA where alkylperoxy and acylperoxy radicals are active epoxidants. Prior coordination of an oxidant to heteropoly anion is not a necessary stage for the oxidant homolytic activation. Alkene epoxidation by iodosobenzene occurs via oxidant coordination to the catalyst and has a heterolytic mechanism, which involves the formation of metal oxy species.
Cite:
Kholdeeva O.A.
, Grigorʹev V.A.
, Maksimov G.M.
, Zamaraev K.I.
Mechanisms of Oxidant Activation in Alkene Epoxidation Catalyzed by Monosubstituted Heteropolytungstates
Kinetics and Catalysis. 1997. V.38. N4. P.507-512. WOS Scopus РИНЦ ANCAN
Mechanisms of Oxidant Activation in Alkene Epoxidation Catalyzed by Monosubstituted Heteropolytungstates
Kinetics and Catalysis. 1997. V.38. N4. P.507-512. WOS Scopus РИНЦ ANCAN
Original:
Холдеева О.А.
, Григорьев В.А.
, Максимов Г.М.
, Замараев К.И.
Механизмы активации окислителей в реакциях эпоксидирования алкенов, катализируемых монозамещенными гетерополивольфраматами
Кинетика и катализ. 1997. Т.38. №4. С.554-559. РИНЦ publication_identifier_short.rz_viniti_identifier_type
Механизмы активации окислителей в реакциях эпоксидирования алкенов, катализируемых монозамещенными гетерополивольфраматами
Кинетика и катализ. 1997. Т.38. №4. С.554-559. РИНЦ publication_identifier_short.rz_viniti_identifier_type
Dates:
| Submitted: | Nov 20, 1995 |
| Published print: | Jul 1, 1997 |
Identifiers:
| Web of science: | WOS:A1997XU99700011 |
| Scopus: | 2-s2.0-0005576237 |
| Elibrary: | 13257127 |
| Chemical Abstracts: | 1997:597175 |
| Chemical Abstracts (print): | 127:292785 |