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Abstract The synthesis of a bis(arylphosphinito)amide pincer ligand P2ONO− designed to form two six-membered rings upon metallation is reported. Phosphination of a known bis(phenolato)amide ONO3− scaffold led to isolation of… Click to show full abstract
Abstract The synthesis of a bis(arylphosphinito)amide pincer ligand P2ONO− designed to form two six-membered rings upon metallation is reported. Phosphination of a known bis(phenolato)amide ONO3− scaffold led to isolation of two isomers: the intended H(P2ONO) preligand with an amine moiety is formed as a kinetic product, which isomerizes via net oxidative addition of the amine N−H to phosphorous to yield a benzoxazaphosphole-containing thermodynamic product. Both isomers undergo productive metallation with NiBr2(dimethoxyethane) to produce the same complex, (P2ONO)NiBr. Treatment with triethylborohydride furnished the terminal hydride complex (P2ONO)NiH. The bromide and hydride complexes enabled comparisons of the steric and electronic properties of the P2ONO− ligand with other amide-based pincers.
Journal Title: Polyhedron
Year Published: 2020
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