Original scientific paper

Effects of Halide Ions and Carbon Monoxide on the Reactions of Iron(III) with Alkyl Radicals

Andreja Bakač ; Ames Laboratorj, Iowa State University, Ames, Iowa 50011, USA

Abstract

In aqueous Solutions in the presence of carbon monoxide, the Fenton-like reactions between Fe(H₂O)₃2+ and alkyl hydroperoxides (RC(CH₃)₂OOH, R = CH₃, C₂H₅) readily produce acyl radicals, R•CO. For R = CH₃, the resulting acetyl radicals reduce Fe(H₂O)₆3+, k = 6 × 105 mol-1 dm3 s-1. The reaction of Fe(H₂O)₆3+ with •CH₃ is much slower, k ≈ 4 × 103 mol-1 dm3 s-1. Halide ions have an accelerating effect and lead to the formation of halomethanes. The rate constant for the reaction Fe(H₂O)₅Br2+ + #CH₃ -> CH₃Br + Fe(H₂O)₆2+ is greater than 108 mol-1 dm3 s-1.

Keywords

carbon monoxide; Fenton reaction; alkyl hydroperoxide; iron; alkyl radicals

Hrčak ID:

131878

URI

https://hrcak.srce.hr/131878

Publication date:

1.8.2001.

Visits: 956 *