Hydridorhodium(I) complexes with amphiphilic polyether phosphines. NMR study and biphasic hydroformylation of 1-octene

Antoni Solsona, Joan Suades, René Mathieu

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31 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)172-181
JournalJournal of Organometallic Chemistry
Volume669
Issue number1-2
DOIs
Publication statusPublished - 3 Mar 2003

Keywords

  • Amphiphilic phosphines
  • Biphasic hydroformylation
  • Hydridorhodium(I) complexes

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