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Structural studies on ruthenium(II) complexes used in interphase catalysis for the hydrogenation of ketones
Author(s) -
Krishnan Venkata,
Bertagnolli Helmut
Publication year - 2007
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1195
Subject(s) - ruthenium , chemistry , catalysis , extended x ray absorption fine structure , x ray absorption fine structure , interphase , photochemistry , transfer hydrogenation , combinatorial chemistry , absorption spectroscopy , spectroscopy , organic chemistry , physics , quantum mechanics , biology , genetics
Structural studies were performed on catalytically active ruthenium(II) complexes used in interphases, by means of XAFS spectroscopy. The EXAFS investigations indicate that the complexes retain their structural integrity when they are embedded on polysiloxane matrices to form stationary phase materials. The AXAFS studies reveal that the variations in the catalytic activity of the complexes with different ligands can be correlated to the differences in the electronic structure around the active ruthenium center. The EXAFS investigations show that, in asymmetric transfer hydrogenation reactions catalysed by ruthenium(II) complexes, the co‐catalyst plays a crucial role not only in enhancing the catalytic activity, but also in determining the structure of the intermediate species. Copyright © 2007 John Wiley & Sons, Ltd.