Catalytic hydrogenation using complexes of base metals with tridentate ligands
AssigneeLos Alamos National Security, LLC
InventorsKalyan V. Vasudevan, Guoqi Zhang, Susan K. Hanson
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Abstract
Complexes of cobalt and nickel with tridentate ligand PNHPR are effective for hydrogenation of unsaturated compounds. Cobalt complex [(PNHPCy)Co(CH2SiMe3)]BArF4 (PNHPCy=bis[2-(dicyclohexylphosphino)ethyl]amine, BArF4=B(3,5-(CF3)2C6H3)4)) was prepared and used with hydrogen for hydrogenation of alkenes, aldehydes, ketones, and imines under mild conditions (25-60° C., 1-4 atm H2). Nickel complex [(PNHPCy)Ni(H)]BPh4 was used for hydrogenation of styrene and 1-octene under mild conditions. (PNPCy)Ni(H) was used for hydrogenating alkenes.
Claims19
A composition of the formula
- wherein each R1 is independently selected from cycloalkyl, alkyl, substituted alkyl, phenyl, or substituted phenyl;
- wherein R2 is —CH2Si(CH3)3, H, alkyl, substituted alkyl, phenyl, substituted phenyl, alkoxide, or amido;
- wherein M is cobalt or nickel;
- and
- wherein X is a counterion.
A composition of the formula
- wherein each R1 is independently selected from cycloalkyl, alkyl, substituted alkyl, phenyl, or substituted phenyl;
- wherein R2 is —CH2Si(CH3)3, H, alkyl, substituted alkyl, phenyl, substituted phenyl, alkoxide, or amido;
- and
- wherein M is cobalt or nickel.
Dependencies are inferred from the claim text.