Iron Catalysed Oxidation of Unreactive C -H Bonds

Iron Catalysed Oxidation of Unreactive C -H Bonds

An iron complex catalyst is studied to analyse its potential in homogeneous catalysis, developed previously by the catalysis research group. In this context, the iron complex trans [Fe(NCCN)Me(MeCN)2](PF6)2, complex 1, is applied to test its catalytic effect in the formation of phenol from benzene i...

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Bibliographic Details
Main Author: Trindade, Joana Maria Coelho
Format: Dissertation
Language:English
Published: ProQuest Dissertations & Theses 01-01-2015
Subjects:
Acids
Ammonia
Atmosphere
Atmospheric pressure
Atmospheric sciences
Carbon monoxide
Catalysis
Catalytic oxidation
Chemical engineering
Chemical industry
Chromatography
Environmental Health
Environmental protection
Finance
Fischer-Tropsch process
Hydrocarbons
Market prices
Metals
Organic chemistry
Phenols
Pollutants
Solvents
Toxicity
Toxicology
Yield curve
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Summary:An iron complex catalyst is studied to analyse its potential in homogeneous catalysis, developed previously by the catalysis research group. In this context, the iron complex trans [Fe(NCCN)Me(MeCN)2](PF6)2, complex 1, is applied to test its catalytic effect in the formation of phenol from benzene in a hydroxylation reaction using aqueous H2O2 as the oxidizing agent. In a second stage, the complex trans-[Fe(NCCN)Me(MeCN)2](PF6)2is tested again in an epoxidation reaction with cis-cyclooctene in the presence of a gaseous oxidizing agent, molecular oxygen.The hydroxylation reactions with complex 1 where accomplished with mol% variation of the catalyst, equivalents of H2O2, temperature (-10 °C, 0 °C, rt and 50 °C) and with kinetic studies (30 seconds up to two days). The experiments showed good reproducibility. The initial experiments with mol% of catalyst showed greater conversion (11.41%) and yield (5.92%) at 2 mol%, with little difference to 1 mol%. The oxidizing agent experiments had its higher conversion for 100 equivalents at 1 mol% catalyst and the yields increased with equivalents used and mol% of catalyst. The highest temperatures (50 ºC) revealed bigger yields and the kinetic studies showed that the reaction stabilizes after 30 minutes. The catalyst shows a limited interaction with benzene but in agreement with the existing literature. The epoxidation of cis-cyclooctene with molecular oxygen under pressure and high temperatures is also reported with no transformation to the desired epoxide.
ISBN:9798383403877