Synthesis and catalysis of a silica-supported cobalt carbonyl cluster |
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| Affiliation: | 1. Experimental Molecular Biophysics, Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany;2. Department of Biochemistry and Molecular Biology, Universitat de València, Dr. Moliner 50, 46100 Burjassot, Spain;3. Interdisciplinary Research Structure for Biotechnology and Biomedicine (ERI BIOTECMED), Universitat de València, Dr. Moliner 50, 46100 Burjassot, Spain;1. Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran;2. Delft University of Technology, EEMCS Faculty, Delft, The Netherlands |
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| Abstract: | The supported metal cluster, Co4(CO)8(μ2-CO)2(μ4-PC6H4)/(SiO2) (2), which decomposed at 290°C, was synthesized. The cobalt and phosphorus contents were 10.51 and 2.64%, respectively. The IR spectrum of 2 exhibits absorptions at 2010 and 1840 cm−1 assigned to the terminal carbonyl and bridged carbonyl, respectively. The effects of the reaction conditions and the structure of olefins on the hydroformylation using 2 have been investigated. Nearly 100% conversion and selectivity could be reached by hydroformylation of 1-hexene under conditions of 130°C, 40 kg/cm2, H2/CO = 1, for 6 h. The rate order of hydroformylation of olefins was as follows: 1-hexene > cyclohexene > diisobutene > styrene. The catalytic activity was kept almost constant after ten-time repeated use (240 h). |
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