One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Product Details of 108-47-4, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N
Cation Radical-Nucleophile Combination Reactions. Reactions of Nitrogen-Centered Nucleophiles with Cation Radicals Derived from Anthracenes
Cation radicals derived from anthracene and 9-substituted anthracenes react with pyridine and substituted pyridines to form pyridinium salts. 9-Nitro- and 9-cyano-substituted cation radicals were observed to be about 102 times as reactive as unsubstituted anthracene (AH) cation radicals while the 9-phenylanthracene (PAH) cation radical was found to be from 2 to 7 times less reactive than AH.+.The reactivities of the nitrogen-centered nucleophiles were observed to depend upon both electronic and steric factors.The mechanism of the reactions involves nucleophilic attack by the nitrogen lone pair at the 10-position of the cation radical.The reactions are accompanied by a change in hybridization, sp2 to sp3, at the anthracene 10-position, giving rise to inverse deuterium kinetic isotope effects ranging from 0.7 to 0.8 when the 10-position is substituted with deuterium.An electron-transfer mechanism for the substitution reactions was ruled out on the basis of energetic considerations.
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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis¡ªI. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis