Ruthenium-benzocrownether complexes: Synthesis, structures, catalysis and immobilisation in ionic liquids

A facile pathway to [RuCl<sub>2</sub>(&eta;<sup>6</sup>-benzocrownether)]<sub>2</sub> complexes is described and crystal structures of the complexes [RuCl<sub>2</sub>(&eta;<sup>6</sup>-benzo-15-crown-5)]<sub>2</sub> and [RuCl<sub>2</sub>(&eta;<sup>6</sup>-dibenzo-18-crown-6)]<sub>2</sub> are reported. The complexes were derivatised with (1S,2R)-2-amino-1,2-diphenylethanol and evaluated in the enantioselective transfer-hydrogenation of acetophenone. The effect of complexation of different alkaline metals (Na, K, Cs) within the crown on the selectivity and reaction rate was studied. Interaction of a sulfonated phosphine ligand with the crown was probed by NOESY-NNIR and utilisation of the crownether to serve as an anchor for catalyst immobilisation was investigated.


Published in:
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 690, 23, 5055-5065
Year:
2005
Laboratories:




 Record created 2006-02-13, last modified 2018-03-17


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