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Cobalt(II) and (I) Complexes of Diphosphine-Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions.


ABSTRACT: The hydrosilylation of unsaturated compounds homogeneously catalyzed by cobalt complexes has gained considerable attention in the last years, aiming at substituting precious metal-based catalysts. In this study, the catalytic activity of well-characterized CoII and CoI complexes of the pToldpbp ligand is demonstrated in the hydrosilylation of 1-octene with phenylsilane. The CoI complex is the better precatalyst for the mentioned reaction under mild conditions, at 1 mol-% catalyst, 1 h, room temperature, and without solvent, yielding 84?% of octylphenylsilane. Investigation of the substrate scope shows lower performance of the catalyst in styrene hydrosilylation, but excellent results with allylbenzene (84?%) and acetophenone (> 99?%). This catalytic study contributes to the field of cobalt-catalyzed hydrosilylation reactions and shows the first example of catalysis employing the dpbp ligand in combination with a base metal.

SUBMITTER: Verhoeven DGA 

PROVIDER: S-EPMC6472597 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Cobalt(II) and (I) Complexes of Diphosphine-Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions.

Verhoeven Dide G A DGA   Kwakernaak Joost J   van Wiggen Maxime A C MAC   Lutz Martin M   Moret Marc-Etienne ME  

European journal of inorganic chemistry 20190128 5


The hydrosilylation of unsaturated compounds homogeneously catalyzed by cobalt complexes has gained considerable attention in the last years, aiming at substituting precious metal-based catalysts. In this study, the catalytic activity of well-characterized Co<sup>II</sup> and Co<sup>I</sup> complexes of the <sup><i>p</i>Tol</sup>dpbp ligand is demonstrated in the hydrosilylation of 1-octene with phenylsilane. The Co<sup>I</sup> complex is the better precatalyst for the mentioned reaction under m  ...[more]

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