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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Oxidation of alkanes and benzene with hydrogen peroxide catalyzed by ferrocene in the presence of acids

Texto completo
Autor(es):
Shul'pina, Lidia S. [1] ; Kudinov, Aleksandr R. [1] ; Mandelli, Dalmo [2] ; Carvalho, Wagner A. [2] ; Kozlov, Yuriy N. [3] ; Vinogradov, Mikhail M. [1] ; Ikonnikov, Nikolay S. [1] ; Shul'pin, Georgiy B. [3]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Russian Acad Sci, Nesmeyanov Inst Organoelement Cpds, Moscow 119991 - Russia
[2] Fed Univ ABC UFABC, Ctr Nat & Human Sci, BR-09210170 Santo Andre, SP - Brazil
[3] Russian Acad Sci, Semenov Inst Chem Phys, Moscow 119991 - Russia
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF ORGANOMETALLIC CHEMISTRY; v. 793, p. 217-231, SEP 15 2015.
Citações Web of Science: 17
Resumo

The efficient (turnover numbers attained 1200) oxidation of alkanes to the corresponding alkyl hydroperoxides by H2O2 in the presence of catalytic amounts of ferrocene proceeds in MeCN at 40-50 degrees C. Benzene is oxidized in the same system to phenol. An obligatory component of the catalytic system for both reactions is pyrazine-2-carboxylic acid (PCA) or trifluoroacetic acid (TFA). Kinetic study as well as selectivity parameters testified that the oxidation proceeds with the participation of hydroxyl radicals. In the case of PCA as a co-catalyst the initial rate W-0 of the reaction with both cyclohexane and benzene depends quadratically on {[}Cp2Fe](0) whereas the two reactions in the presence of TFA are of half order in ferrocene. The ferrocene-catalyzed reaction of cyclohexane with H-2 O-16(2) in an atmosphere of labeled O-18(2) gave after 2 h a mixture of labeled and unlabeled cyclohexyl hydroperoxide (total yield 20% based on starting cyclohexane) containing up to 69% of O-18 (the analysis was after reduction of cyclohexyl hydroperoxide into cyclohexanol with PPh3). (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 14/09136-5 - Foto e termo-oxidação de hidrocarbonetos catalisada por complexos de metais de transição (V, Cu, Os, Fe, Mn e outros)
Beneficiário:Dalmo Mandelli
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional