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Issue 6, 2002
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Biphasic hydroformylation in new molten salts—analogies and differences to organic solvents

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Abstract

New ionic compounds 1,2,3-trimethylimidazolium triflate (1) and 1-ethyl-2,3-dimethylimidazolium triflate (2) and (3-butylimidazole)triphenylboron (4) have been formed by alkylation and condensation reactions. An ion exchange reaction yielded the ionic compound 1-butyl-3-methylimidazolium tetraphenylborate (3). Molecular structures of all four compounds were determined by single crystal X-ray diffractometry. Utilizing two known rhodium complexes as catalyst precursors, compounds 1, 2 and 4 were used as solvents for biphasic hydroformylation reactions of two long chain 1-olefins. The results were compared to reactivities in the conventional solvent toluene in which similar turnover numbers but a higher tendency towards isomerization and hydrogenation occurred.

Graphical abstract: Biphasic hydroformylation in new molten salts—analogies and differences to organic solvents

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Publication details

The article was received on 29 Aug 2001, accepted on 18 Dec 2001 and first published on 20 Feb 2002


Article type: Paper
DOI: 10.1039/B107720A
J. Chem. Soc., Dalton Trans., 2002, 1132-1138

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    Biphasic hydroformylation in new molten salts—analogies and differences to organic solvents

    O. Stenzel, H. G. Raubenheimer and C. Esterhuysen, J. Chem. Soc., Dalton Trans., 2002, 1132
    DOI: 10.1039/B107720A

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