Co6H8(PiPr3)6: A Cobalt Octahedron with Face‐Capping Hydrides
- 16 November 2016
- journal article
- research article
- Published by Wiley in Angewandte Chemie International Edition
- Vol. 55 (51) , 15821-15825
Abstract
A square‐planar Co4 amide cluster, Co4{N(SiMe3)2}4 (2), and an octahedral Co6 hydride cluster, Co6H8(PiPr3)6 (4), were obtained from metathesis‐type amide to hydride exchange reactions of a CoII amide complex with pinacolborane (HBpin) in the absence/presence of PiPr3. The crystal structure of 4 revealed face‐capping hydrides on each triangular [Co3] face, while the formal CoII2CoI4 oxidation state of 4 indicated a reduction of the cobalt centers during the assembly process. Cluster 4 catalyzes the hydrosilylation of 2‐cyclohexen‐1‐one favoring the conjugate reduction. Generation of the catalytically reactive Co cluster species was indicated by a trapping experiment with a chiral chelating agent.Keywords
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