Synthetic Route of 108-47-4, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N. In a Article£¬once mentioned of 108-47-4
Neutral beta-diketiminato nickel(II) monoalkyl complexes
Reaction of NiCl2(2,4-lutidine)2 (1) with Tl[Me2NN] (3) in THF results in the transmetallation of the beta-diketiminate ligand from which the tetrahedral {[Me2NN]NiCl}2 (4) was isolated in poor yield. After filtration of the TlCl formed in the reaction between 1 and 3 in THF, addition of Grignard reagents RMgBr results in the isolation of monoalkyl complexes [Me2NN]Ni(R)(2,4-lutidine) (R=Me (5), Et (6), Pr (7)) in 40-70% yield. X-ray structures 5-7 of show these monoalkyls to be somewhat crowded, square planar species. NMR studies of the diamagnetic monoalkyl complexes show that lutidine dissociation/reassociation occurs on the NMR timescale at room temperature. In ethyl and propyl complexes 6 and 7, an equilibrium between the four coordinate [Me2NN]Ni(R)(2,4-lutidine) and a lutidine-free species [Me2NN]Ni(R) (R=Et, Pr) is observed. Broad, high-field 1H resonances consistent with the presence of beta-H agostic alkyl groups are observed for the base-free species. The observation of two broad upfield 1H NMR signals at delta -2.7 and -7.3 ppm for the base-free Ni-propyl complex suggests a mixture of primary and secondary beta-agostic isomers that reversibly interconvert by beta-H elimination/reinsertion. Ethylene slowly inserts into monoalkyls 5-7 demonstrate to give highly branched ethylene oligomers.
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 108-47-4
Reference£º
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