Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 233, Issue 1-2, Pages 67-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2005.02.005
Keywords
homogeneous catalysis; hydroformylation; N-heterocyclic carbenes; 1-octene; rhodium
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Four different Rh (1) complexes, i.e. [RhBr(1,3-di(2-propyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene)(COD)] (1), [RhCl (1,3-di(2-propyl)3,4,5,6-tetrahydropyrimidin-2-ylidene) (COD)] (2), [RhBr(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene) (COD)] (3) and [RhCl(1,3dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene)(COD)] (4), (COD = eta(4)-1,5-cyclooctadiene, mesityl = 2,4,6-trimethylphenyl), were used in the hydroformylation of 1-octene. All compounds were active in the hydroformylation, showing a time dependant n:iso ratio, indicative for olefin isomerization. This olefin isomerization was also monitored as a function of time. TOFs for hydroformylation obtained with 1 and 2 were around 500, those achieved with 3 and 4 around 1500 h(-1.) (c) 2005 Elsevier B.V. All rights reserved.
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