Related Products of 49669-22-9, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 49669-22-9, Name is 6,6′-Dibromo-2,2′-bipyridine, molecular formula is C10H6Br2N2. In a Article£¬once mentioned of 49669-22-9
Comparison of the catalytic activity of [(eta5-C 5H5)Ru(2,2?-bipyridine)(L)]OTf versus [(eta5-C5H5)Ru(6,6?-diamino-2,2?- bipyridine)(L)]OTf (L = labile ligand) in the hydrogenation of cyclohexanone. Evidence for the presence of a metal-ligand bifunctional mechanism under acidic conditions
The two title complexes as well as the dimeric complex [Ru(II) (eta5-C5H5)(6,6?-diamino-2,2?- bipyridine)]2(OTf)2 have been synthesized and characterized by NMR and single-crystal X-ray crystallography. The direct structural comparison of the 2,2?-bipyridine and 6,6?-diamino-2, 2?-bipyridine complexes suggests that the electronic and steric environments of the ruthenium centers in both complexes are essentially equivalent, providing for a unique opportunity to probe the influence of the noncoordinated amine substituent on the relative reactivity and catalytic activity of the complexes. Opposite to what would be anticipated on the basis of steric effects, the bulkier amine-substituted ligand results in a catalyst showing substantially higher activity in the hydrogenation of cyclohexanone in acidic medium, which is attributed to the operation of a metal-ligand bifunctional hydrogenation mechanism mediated by the amine substituents in their protonated form acting as proton shuttles.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Related Products of 49669-22-9, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 49669-22-9, in my other articles.
Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI