Catalytic oxidation of 1-hexene with molecular oxygen by iridium nitro complexes |
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| Authors: | L. A. Quijije M. Mediavilla A. J. Pardey C. Longo de Pardey P. Baricelli S. A. Moya |
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| Affiliation: | (1) Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela;(2) Facultad de Farmacia, Universidad Central de Venezuela, Caracas, Venezuela;(3) Centro de Investigaciones Químicas, Facultad de Ingeniería, Universidad de Carabobo, Valencia, Estado, Carabobo, Venezuela;(4) Departamento de Química Aplicada, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 307-2, Santiago, Chile |
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| Abstract: | The oxidation of 1-hexene by molecular oxygen catalyzed by iridium(III) complexes, [Ir(CH3CN)5−xClx(NO2)]2−x (x=0, 1, or 2) has been studied in acetonitrile under P(O2)=1.5 atm and T=100°C. [Ir(CH3CN)5(NO2)](PF6)2 oxidizes 1-hexene to 1,2-epoxyhexane. Complex [Ir(CH3CN)4Cl(NO2)]PF6 oxidizes 1-hexene to 2,3-epoxyhexane only in the presence of [Pd(PhCN)2(Cl)2] (an olefin activator). In contrast to the cationic complexes, the neutral complex [Ir(CH3CN)4Cl2(NO2)] oxidizes 1-hexene to 2-hexanone only in the presence of [Pd(PhCN)2(Cl)2]. |
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| Keywords: | Oxidation 1-hexene iridium nitro complexes |
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