Metal site catalyst applied to catalysis of CO2 hydrogenation for preparation of N, N-dimethylformamide and preparation method of metal site catalyst

The invention belongs to the field of catalysis of CO2 hydrogenation, provides a homogeneous catalyst applied to catalysis of CO2 hydrogenation for preparation of a high value-added chemical N, N-dimethylformamide (DMF) and a preparation method of the homogeneous catalyst, and mainly relates to a preparation method of a para-site metal catalyst with a structure capable of being accurately regulated and controlled, and the preparation method comprises the following steps: firstly, accurately designing and synthesizing different amide ligands; and then, respectively carrying out coordination synthesis of catalytic sites with a metal complex to prepare the required catalyst. According to the invention, the double OH-containing para-site metal catalyst is accurately constructed, and the controllable design of a para-site catalytic center is utilized, so that the simultaneous activation of reaction substrates is realized, and the catalytic performance is improved; besides, by suspending an OH functional group on t