Ion-pair effect of phosphino-imidazolium salts on Rh(III)-complex catalyzed hydroformylation of 1-octene in water suspension

Sheng Jie Chen, Yong Yong Wang, Yong Qi Li, Xiao Li Zhao, Ye Liu

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11 Scopus citations

Abstract

A series of phosphino-imidazolium salts (1-4), which are composed of the phosphine-incorporated imidazolium cations and the corresponding counter-anions of PF6-, TfO-, and BF4-, are used in Rh-catalyzed hydroformylation. It was found that when the ionic Rh(III)-complex (1A, [RhIIICl4(L)2]PF 6, L = 1-butyl-2-diphenylphosphino-3-methylimidazolium) was used as the pre-catalyst for hydroformylation of 1-octene, its inert catalytic activity could be efficiently tailored by the ion-pair synergetic effect of ligand 1-4 in water suspension. The single crystal structures of 1, 2, and 4 indicate that the hydrogen bonding network is developed between the cation and anion of ion-pairs 1 and 4, but is completely non-inexistent in 2.

Original languageEnglish
Pages (from-to)5-8
Number of pages4
JournalCatalysis Communications
Volume50
DOIs
StatePublished - 5 May 2014

Keywords

  • 1-Octene
  • Hydroformylation
  • Imidazolium salts
  • Phosphines
  • Rhodium complexes

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