TY - JOUR
T1 - Hydridorhodium(I) complexes with amphiphilic polyether phosphines. NMR study and biphasic hydroformylation of 1-octene
AU - Solsona, Antoni
AU - Suades, Joan
AU - Mathieu, René
PY - 2003/3/3
Y1 - 2003/3/3
N2 - The formation of hydridorhodium(I) complexes with the amphiphilic phosphines was studied by NMR methods and IR spectroscopy. Two approaches were used: (1) the substitution reaction of triphenylphosphine in RhH(CO)(PPh 3 ) 3 by an amphiphilic phosphine and (2) a reaction between the precursor Rh(acac) (CO) 2 , syngas and the amphiphilic ligand in hydroformylation reaction conditions. Both approaches show the formation of P-coordinated hydridorhodium(I) complexes, and no relevant chelated (P, O) complexes were recognised. The biphasic rhodium-catalysed hydroformylation of 1-octene with the following water-soluble amphiphilic phosphines was studied: 4-(R)C 6 H 4 (OCH 2 CH 2 ) n P(Ph)CH 2 CH 2 SO 3 Na (R = 2,2,4,4-tetramethylbutyl, n̄ = 1.4, 5.1, 11.2, R = n-nonyl, n̄ = 1.6, 5.6, 11.4), and RP(Ph)CH 2 CH 2 SO 3 Na (R = n-octyl, CH 3 (OCH 2 CH 2 ) 2 OCH 2 CH 2 ). Ligands with a hydrophobic group and a short polyether chain led to the higher conversion. This result is ascribed to the ability of these ligands to increase the metal concentration in the organic phase. © 2003 Elsevier Science B.V. All rights reserved.
AB - The formation of hydridorhodium(I) complexes with the amphiphilic phosphines was studied by NMR methods and IR spectroscopy. Two approaches were used: (1) the substitution reaction of triphenylphosphine in RhH(CO)(PPh 3 ) 3 by an amphiphilic phosphine and (2) a reaction between the precursor Rh(acac) (CO) 2 , syngas and the amphiphilic ligand in hydroformylation reaction conditions. Both approaches show the formation of P-coordinated hydridorhodium(I) complexes, and no relevant chelated (P, O) complexes were recognised. The biphasic rhodium-catalysed hydroformylation of 1-octene with the following water-soluble amphiphilic phosphines was studied: 4-(R)C 6 H 4 (OCH 2 CH 2 ) n P(Ph)CH 2 CH 2 SO 3 Na (R = 2,2,4,4-tetramethylbutyl, n̄ = 1.4, 5.1, 11.2, R = n-nonyl, n̄ = 1.6, 5.6, 11.4), and RP(Ph)CH 2 CH 2 SO 3 Na (R = n-octyl, CH 3 (OCH 2 CH 2 ) 2 OCH 2 CH 2 ). Ligands with a hydrophobic group and a short polyether chain led to the higher conversion. This result is ascribed to the ability of these ligands to increase the metal concentration in the organic phase. © 2003 Elsevier Science B.V. All rights reserved.
KW - Amphiphilic phosphines
KW - Biphasic hydroformylation
KW - Hydridorhodium(I) complexes
U2 - 10.1016/S0022-328X(03)00040-8
DO - 10.1016/S0022-328X(03)00040-8
M3 - Article
SN - 0022-328X
VL - 669
SP - 172
EP - 181
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -