Olefin Epoxidation by H2O2/MeCN Catalysed by Cyclopentadienyloxidotungsten(VI) and Molybdenum(VI) Complexes: Experiments and Computations
نویسندگان
چکیده
منابع مشابه
Olefin epoxidation by hydrogen peroxide catalysed by molybdenum complexes in ionic liquids and structural characterisation of the proposed intermediate dioxoperoxomolybdenum species.
The complex [Mo(4)O(16)(dmpz)(6)] (1) has been isolated as part of a study of oxodiperoxomolybdenum catalysed epoxidation of olefin substrates with hydrogen peroxide in ionic liquids. Notably, 1 is the first dioxoperoxomolybdenum species to be structurally characterised.
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Re(I) complexes are applied as catalysts for the dehydro-coupling of Me2NH.BH3 and the transfer-hydrogenation of olefins.
متن کاملNew insights into the mechanism of oxodiperoxomolybdenum catalysed olefin epoxidation and the crystal structures of several oxo-peroxo molybdenum complexes.
[Mo(O)(O(2))(2)(L)(2)] compounds (L = pz, pyrazole; dmpz, 3,5-dimethylpyrazole) were reacted stoichiometrically, in the absence of an oxidant, with cis-cyclooctene in an ionic liquid medium where selective formation of the corresponding epoxide was observed. However, this oxo-transfer reaction was not observed for some other olefins, suggesting that alternative reaction pathways exist for these...
متن کاملThe role of halogenated carborane monoanions in olefin hydrogenation catalysed by cationic iridium phosphine complexes.
Iridium hydridophosphine complexes of general formula [Ir(PR3)2H2(anion)](PR3= PPh3, PMe2Ph; anion =[1-closo-CB(11)H(6)Cl(6)]-, [1-closo-CB(11)H(6)I(6)]-, [BAr(F)4]-) have been prepared by hydrogenation of cyclooctadiene precursor complexes. Solid-state structures of selected examples of these complexes reveal intimate contacts between the carborane anion and cation, with the anion binding thro...
متن کاملMechanistic insights into β-oxygen atom transfer in olefin epoxidation mediated by W(VI) complexes and H2O2.
A DFT investigation of the olefin epoxidation mechanism catalysed by the [Cp*WO(OH)(2)](+) complex with H(2)O(2) reveals that the outer sphere transfer of the hydroperoxido O(β) atom to the olefin is considerably more favourable than that of the hydroperoxido O(α) atom. The reasons for this unusual pathway are discussed.
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ژورنال
عنوان ژورنال: Chemistry - A European Journal
سال: 2010
ISSN: 0947-6539
DOI: 10.1002/chem.201000298