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  • Title: [(Triphos)Ni(eta2-BH4)]: an unusual nickel(I) borohydride complex.
    Author: Kandiah M, McGrady GS, Decken A, Sirsch P.
    Journal: Inorg Chem; 2005 Nov 28; 44(24):8650-2. PubMed ID: 16296816.
    Abstract:
    Reduction of [(triphos)NiCl2] (1) with an excess of NaBH4 in THF produces the paramagnetic Ni(I) complex [(triphos)Ni(eta2-BH4)] (2). X-ray crystallography shows 1 to be a square-planar Ni(II) species in which the phosphine ligand is bidentate, whereas 2 has pseudotetrahedral geometry at the Ni(I) center, with a tridentate phosphine and the borohydride ligand occupying a single coordination site. Density functional theory calculations show the unpaired electron in 2 to reside in an orbital located mainly on the Ni atom.
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