Three-coordinate Co(I) provides access to unsaturated dihydrido-Co(III) and seven-coordinate Co(V) |
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| Authors: | Ingleson Michael Fan Hongjun Pink Maren Tomaszewski John Caulton Kenneth G |
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| Institution: | Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, IN 47405, USA. |
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| Abstract: | The three-coordinate, T-shaped Co(I) complex, PNPCo (PNP = (tBu2PCH2SiMe2)2N-], is readily synthesized by magnesium reduction of divalent PNPCoCl. Triplet (S = 1) PNPCo is coordinatively and electronically unsaturated and undergoes a thermally reversible oxidative addition reaction with H2, producing trivalent PNPCo(H)2. In contrast, the reaction with excess primary silane PhSiH3 quantitatively generates the base-stabilized silylene Co(V) compound {kappa2-tBu2PCH2Me2SiNSiMe2CH2tBu2P(H)Si=}Co(H)3(SiH2Ph)2. |
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