Activation Of N-H And C-H Bonds And Their Functionalization By Rich Electrical Nickel And Cobalt Complexes Supporting Of Trimethylphosphine

Sp3C-H and N-H bonds are widely existed in organic compounds, and it is a central subject of organic chemistry that the development of transforming to the functional groups. Transition metals have incomparable advantage in this aspect, but most of the existing researches were focused on the ruthenium, rhodium, palladium, platinum and other precious metals. Nickel and cobalt belong to the Ⅷ transition metals, have stronger economic effectiveness and more friendly environment compared with the precious metals. Therefore, sp3carbon and hydrogen and nitrogen hydrogen bonds activation by nickel and cobalt attend the more the attention of chemists.This thesis mainly divided into the following two parts:1. The activation of sp3N-H bonds of N-arylbenzamidine by dimethyl nickel(Ⅱ) supported by trimethylphosphine was implemented, and four new dinuclear nickel compounds1-4were synthesized, the structure which were determined by1HNMR,13CNMR and31PNMR. And two of them were determined by X-ray single crystal diffraction. The single-crystal structure shows us a novel dinuclear octatomic ring Ni compound and it has a C2axis. Each of nickel (II) complex was square-planar coordination geometry and had four ligands which were one trimethylphosphine ligand, one methyl group, the imide group and the imine group at the four vertices. On the basis, reserches on the chemical properties of dinuclear nickel were carries out. Compounds1-4respectively react with CO, CH3I, phenyl acetylene, perchlorobenzene and other small molecule compounds. In addition to the CO, the rest of the reactions did not happen, which show that the compounds1-4have a stable chemical properties and good thermal stability.2. Reacting with cobalt (0) supported by trimethylphosphine, activation attempts of sp3C-H bonds grappling only by a nitrogen atom were operated, and we designed a series of reactions to capture Co-H bonds.