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(η<sup>6</sup>-Arene)-tricarbonylchromium(0) complexes used in olefin hydroformylation reaction with syngas

Abstract:

Aldehydes are compounds with a great scientific interest in its chemical applications, especially to consider a raw material in many industrially and process for manufacturing secondary products, such as, solvents, biodegradable detergents, pharmaceuticals, surfactants, lubricants, other. In this paper we describe the use of commercial chromium carbonyl: [Cr(CO)6] (1), [Cr(CO)3(η6-C6H6)](2a), [Cr(CO)3(η6-C6H5CH3)] (2b), [Cr(CO)3(η6-C8H8O2)] (2c) y [Cr(CO)3(η6-C7H8)] (3), as catalytic precursors in hydroformylation reactions of 1-hexene and cyclohexene with syngas CO/H2 and CO2/H2 in homogeneous phase. In all cases, the reactions conditions (temperature, pressure, CO/H2 ratio, solvents, substrate/catalyst ratio) were optimized and additionally, the catalytic activity was studied employing excess ligands condition or mercury test to verify the homogeneity in the catalytic system. Under optimal conditions, a high percent yield and good selectivity for linear versus branched aldehydes, and for the CO2/H2 system, all the catalysts showed moderate conversion towards linear, branched aldehydes and alcohols with and without NaCl.