Complexes of cobalt and nickel with tridentate ligand PNHP.sup.R are effective for hydrogenation of unsaturated compounds. Cobalt complex [(PNHP.sup.Cy)Co(CH.sub.2SiMe.sub.3)]BAr.sup.F.sub.4 (PNHP.sup.Cy=bis[2-(dicyclohexylphosphino)ethyl]amine, BAr.sup.F.sub.4=B(3,5-(CF.sub.3).sub.2C.sub.6H.sub.3).sub.4)) was prepared and used with hydrogen for hydrogenation of alkenes, aldehydes, ketones, and imines under mild conditions (25-60 C., 1-4 atm H.sub.2). Nickel complex [(PNHP.sup.Cy)Ni(H)]BPh.sub.4 was used for hydrogenation of styrene and 1-octene under mild conditions. (PNP.sup.Cy)Ni(H) was used for hydrogenating alkenes.

The present invention refers to processes for preparing catalyst loaded polyphenylene particles, the so-obtained polyphenylene particles and their use as catalysts.

The present disclosure provides for hybrid catalysts, methods of converting CO.sub.2 to C2 products (e.g., ethylene), systems for converting CO.sub.2 to C2 products (e.g., ethylene), and the like. The hybrid catalyst of the present disclosure effectively uses two steps of converting CO.sub.2 to ethylene in a single hybrid catalyst.

There is provided a process for alkylating a substrate with a photocatalytic system. The process comprises providing a mixture containing an acid, and a substrate (an organic compound). Then, an organophotoredox catalyst of formula Ia is contact with the mixture. Finally, the organophotoredox catalyst is activated with a light irradiation to alkylate the substrate and form a carbon covalent bond.

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A machine learning model predicts a K value for a new iron ethylene oligomerization catalyst structure, where the K value has not yet been experimentally determined.

Phosphino-quinoline-pyridine ligands and compositions that include complexes, the complexes including a phosphino-quinoline-pyridine ligand and a metal coordinated to the ligand are disclosed. Methods of oligomerization, such as methods of oligomerizing alpha-olefins, performed in the presence of a complex that includes a phosphino-quinoline-pyridine ligand are also disclosed.

A machine learning model predicts a K value for a new iron ethylene oligomerization catalyst structure, where the value has not yet been experimentally determined.