CTAB micelles and the hydroformylation of octene with rhodium/TPPTS catalysts - Evidence for the interaction of TPPTS with micelle surfaces

Anders Riisager, Brian E. Hanson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The addition of cetyltrimethylammonium bromide (CTAB) to TPPTS/rhodium hydroformylation catalysts has a complicated effect on reaction activity and selectivity. In water alone as the solvent, high CTAB concentration leads to the formation of emulsions and reaction selectivity drops. In aqueous alcohol solvents selectivity also drops but the effect appears to be due to the solvent composition. Emulsion formation is minimized and initial reaction activity goes through a maximum at a CTAB/TPPTS ratio of 3. NMR studies show that there is a strong interaction of CTAB and TPPTS in water while the interaction in aqueous methanol appears to be nonspecific.
Original languageEnglish
JournalJournal of molecular catalysis a-chemical
Volume189
Issue number2
Pages (from-to)195-202
ISSN1381-1169
Publication statusPublished - 2002

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