Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 218, Issue 2, Pages 171-177Publisher
ELSEVIER
DOI: 10.1016/j.molcata.2004.04.025
Keywords
alkanes; alkyl hydroperoxides; cyclohexane; ethane; homogeneous catalysis; methane; peroxy acids; peroxyacetic acid; oxidation; vanadium complexes
Categories
Ask authors/readers for more resources
Peroxyacetic acid (PAA) oxidizes alkanes in acetonitrile or acetic acid at 60degreesC if a soluble vanadium(V) salt, n-Bu4NVO3 (1), is used as a catalyst. Corresponding ketones, alcohols and alkyl hydroperoxides are the main products. Methane, ethane, propane, cyclohexane, and other higher alkanes were substrates in the oxidations. The proposed mechanism involves the formation of a complex between (1) and PAA with equilibrium constants 3.3 and 6.8 dm(3) mol(-1) for acetonitrile and acetic acid as solvents, respectively. This complex decomposes to produce CH3C(=O)OO. radical and a V-IV derivative. The latter reacts with PAA to generate a CH3C(=O)O-. radical which attacks the alkane abstracting its hydrogen atom. An alkyl radical thus formed adds rapidly a molecule of dioxygen which leads finally to the alkyl hydroperoxide and then to the ketone and alcohol. Other vanadium(V) and vanadium(IV) complexes are also active in this oxidation only if the vanadium ion is not shielded with strongly bound bulky ligands. (C) 2004 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available