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Influence of the ligand structure on SLP‐catalysed hydroformylation of propene
Author(s) -
Hjortkjaer Jes,
Heinrich Bernd,
Čapka Martin
Publication year - 1990
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590040409
Subject(s) - hydroformylation , chemistry , propene , ligand (biochemistry) , triphenylphosphine , phosphine , catalysis , rhodium , medicinal chemistry , regioselectivity , organic chemistry , receptor , biochemistry
Hydroformylation of propene was studied at 90–120°C and 3–10 atm. The catalyst was hydrido‐(carbonyl)tris(triphenylphosphine)rhodium [H(CO)Rh(PPh 3 ) 3 ] supported on silica, in an excess of a liquid phosphine (P) ligand as solvent. The following series of ligands (P) was synthesized and studied in this application: CH 3 (CH 2 ) n PPh 2 ( n = 3, 7, 17), (c – C 6 H 11 ) x PPh 3− x ( x = 0, 1, 2) and also unsaturated allyl‐ and poly(butadienyl)‐diphenylphosphines. The activity and regioselectivity of the catalysts are discussed in terms of the mobility and coordination ability of the ligands used. With the same electron density of the phosphorus atom, the activity of the catalysts increases with the mobility of the ligands. On the other hand, given the same mobility of the ligand, a lower electron density on phosphorus results in increased catalytic activity.