Abstract
After poisoning with pyridine, tartaric acid-modified Ni catalysts showed an unexpected behavior as regards the dependence of enantioselectivity on the reaction temperature. While in the absence of a poison the enantioselectivity decreased with increasing reaction temperature, it remained constant for pyridine-poisoned Ni catalysts. This phenomenon is tentatively explained by assuming that ligand water is replaced by pyridine ligands in the Ni-tartrate complexes on the nickel surface. As pyridine is strongly held by Ni2+ ions, a higher ligand rigidity is attained which keeps the selectivity of the catalyst constant.
Original language | English (US) |
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Pages (from-to) | 187-194 |
Number of pages | 8 |
Journal | Journal of Molecular Catalysis |
Volume | 42 |
Issue number | 2 |
DOIs | |
State | Published - Oct 1987 |
ASJC Scopus subject areas
- Engineering(all)