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- Title
Co<sub>6</sub>H<sub>8</sub>(P<sup> i</sup>Pr<sub>3</sub>)<sub>6</sub>: A Cobalt Octahedron with Face-Capping Hydrides.
- Authors
Ohki, Yasuhiro; Shimizu, Yuki; Araake, Ryoichi; Tada, Mizuki; Sameera, W. M. C.; Ito, Jun‐Ichi; Nishiyama, Hisao
- Abstract
A square-planar Co4 amide cluster, Co4{N(SiMe3)2}4 ( 2), and an octahedral Co6 hydride cluster, Co6H8(P iPr3)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 P iPr3. 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.
- Subjects
HYDRIDES; AMIDE derivatives; EXCHANGE reactions; METAL analysis; CRYSTAL structure
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 51, p16053
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201608262