Reductive coupling of six carbon monoxides by a ditantalum hydride complex

Takahito Watanabe; Yutaka Ishida; Tsukasa Matsuo; Hiroyuki Kawaguchi

doi:10.1021/ja9007276

Reductive coupling of six carbon monoxides by a ditantalum hydride complex

J Am Chem Soc. 2009 Mar 18;131(10):3474-5. doi: 10.1021/ja9007276.

Authors

Takahito Watanabe¹, Yutaka Ishida, Tsukasa Matsuo, Hiroyuki Kawaguchi

Affiliation

¹ Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.

PMID: 19243097
DOI: 10.1021/ja9007276

Abstract

A ditantalum hydride complex undergoes head-to-head C-C coupling of six CO molecules under mild conditions to produce an octaanionic C(6)O(6) unit. During the reaction, eight-electron reduction of six CO molecules takes place. In the product, the C(6)O(6) unit is coordinated to four tantalum metals through six oxygen and two carbon atoms. The geometrical parameters within the Ta(4)C(6)O(6) core indicate significant contribution from a hexatriene-hexaolate form.