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Catalytic Activity Enhancement of a Cyclodextrin/Water‐Soluble‐Rhodium Complex System Due to its Gradual Supramolecular Organization in the Interphase
Author(s) -
Dessoudeix Michel,
Urrutigoïty Martine,
Kalck Philippe
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200107)2001:7<1797::aid-ejic1797>3.0.co;2-m
Subject(s) - chemistry , cyclodextrin , interphase , supramolecular chemistry , catalysis , rhodium , combinatorial chemistry , water soluble , supramolecular catalysis , nanotechnology , organic chemistry , molecule , genetics , biology , materials science
Heavy terminal alkenes can be hydroformylated at a significant rate by using the water‐soluble catalyst precursor [Rh 2 (μ‐S t Bu) 2 (CO) 2 (TPPTS) 2 ] and β‐cyclodextrin or its dimethylated form as phase‐transfer agent. A study of the recycling has shown that the aqueous phase can be directly reintroduced into catalysis and also that each new run presents a slightly higher level of activity. Careful examination of the parameters of this catalysis leads us to propose that a gradual supramolecular organization in the interphase occurs for the rhodium complex, its solvation sphere and cyclodextrin which should involve at least two molecules in a head‐to‐tail or head‐to‐head arrangement.