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- W1993485352 abstract "Coordinatively unsaturated 15e alkynyl- (TpiPr2Co−C⋮C−R) and aryl-cobalt complexes (TpiPr2Co-aryl) bearing the hydrotris(3,5-diisopropylpyrazolyl)borato ligand (TpiPr2) are prepared by dehydrative condensation of the hydroxo complex [TpiPr2Co(μ-OH)2]2 with 1-alkyne and arylation of the chloro complex TpiPr2Co−Cl with Grignard reagents, respectively. Spectroscopic and crystallographic analyses reveal the apparent C3-symmetrical tetrahedral structures with high-spin electronic configuration (S = 3/2), which should result from the property of the TpiPr2 ligand as a tetrahedral enforcer. The TpiPr2Co and hydrocarbyl fragments are connected dominantly through σ-bonding interaction, and π-interaction including back-donation is not significant as revealed by EHMO calculations. The Co−C bonds are so polarized as to be readily protonated even by moisture to give the corresponding hydrocarbons, but the reactivity toward unsaturated hydrocarbons turns out to be sluggish. TpiPr2Co−C⋮C−COOMe is found to catalyze a rar..." @default.
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- W1993485352 date "2002-07-31" @default.
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- W1993485352 title "Synthesis and Characterization of Coordinatively Unsaturated Alkynyl- and Aryl-Cobalt Complexes with 15 Valence Electrons, Tp<i><sup>i</sup></i><sup>Pr2</sup>Co−R, Bearing the Hydrotris(3,5-diisopropylpyrazolyl)borato Ligand (Tp<i><sup>i</sup></i><sup>Pr2</sup>)" @default.
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- W1993485352 doi "https://doi.org/10.1021/om020268u" @default.
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