期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 696, 期 10, 页码 2003-2007出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2010.10.048
关键词
Rhodium; Hydroformylation; Poly(propyleneimine); Metallodendrimers; Iminophosphine; Iminopyridyl
资金
- University of Cape Town
- National Research Foundation (NRF) of South Africa
- NRF-DST Centre of Excellence in Catalysis (c*change)
The synthesis of poly(propyleneimine)-iminopyridyl and iminophosphine rhodium(I) metallodendrimers, with rhodium coordinated to monodentate (N-donor) and chelating, heterobidentate (P,N) moieties respectively located on the periphery, has been accomplished in order to evaluate their potential as hydroformylation catalysts. Related mononuclear complexes were obtained in a similar manner to model the multinuclear complexes. The multinuclear rhodium(I) complexes were found to be effective catalyst precursors in the hydroformylation of 1-octene, achieving higher conversions, faster reaction rates and slightly enhanced catalytic activity when compared with analogous mononuclear rhodium complexes. Hydroformylation reactions using the tetra-and octanuclear rhodium complexes generally show a chemoselective formation of aldehydes, together with a small amount of isomerisation products. (C) 2010 Elsevier B.V. All rights reserved.
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