A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Application In Synthesis of Tris(2-pyridylmethyl)amine, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 16858-01-8, Name is Tris(2-pyridylmethyl)amine, molecular formula is C18H18N4. In a Article, authors is Weisser, Fritz£¬once mentioned of 16858-01-8
Ruthenium complexes of tripodal ligands with pyridine and triazole arms: Subtle tuning of thermal, electrochemical, and photochemical reactivity
Electrochemical and photochemical bond-activation steps are important for a variety of chemical transformations. We present here four new complexes, [Ru(Ln)(dmso)(Cl)]PF6 (1-4), where Ln is a tripodal amine ligand with 4-n pyridylmethyl arms and n-1 triazolylmethyl arms. Structural comparisons show that the triazoles bind closer to the Ru center than the pyridines. For L2, two isomers (with respect to the position of the triazole arm, equatorial or axial), trans-2sym and trans-2 un, could be separated and compared. The increase in the number of the triazole arms in the ligand has almost no effect on the Ru II/RuIII oxidation potentials, but it increases the stability of the Ru-Sdmso bond. Hence, the oxidation waves become more reversible from trans-1 to trans-4, and whereas the dmso ligand readily dissociates from trans-1 upon heating or irradiation with UV light, the Ru-S bond of trans-4 remains perfectly stable under the same conditions. The strength of the Ru-S bond is not only influenced by the number of triazole arms but also by their position, as evidenced by the difference in redox behavior and reactivity of the two isomers, trans-2sym and trans-2un. A mechanistic picture for the electrochemical, thermal, and photochemical bond activation is discussed with data from NMR spectroscopy, cyclic voltammetry, and spectroelectrochemistry. Copyright
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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI