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Platinum-Catalyzed Asymmetric Hydrogenation: Spectroscopic Evidence for an O-H-O Hydrogen-Bond Interaction between Substrate and Modifier |
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| Authors: | Meemken Fabian Maeda Nobutaka Hungerbühler Konrad Baiker Alfons |
| Affiliation: | 1. Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, H?nggerberg, HCI, 8093 Zürich (Switzerland) http://www.sust‐chem.ethz.ch, www.baiker.ethz.ch;2. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589 (Saudi Arabia) |
| Abstract: | The mighty cinchonidine: A diastereomeric surface complex in the asymmetric hydrogenation of ketopantolactone on chirally modified Pt is monitored by in?situ ATR-IR spectroscopy, in combination with modulation excitation spectroscopy and phase-sensitive detection. Cinchonidine bound to the surface with its quinoline ring is shown to induce the chiral environment through a C9?O???H???O?C interaction. |
| Keywords: | asymmetric hydrogenation IR spectroscopy diastereomeric complex heterogeneous catalysis modulation excitation spectroscopy |
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