Communication

Hexakis(trimethylsilyl)tetrahedranyltetrahedrane^†

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 298‐53‐4314

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Akira Sekiguchi Prof. Dr.

sekiguch@staff.chem.tsukuba.ac.jp

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 298‐53‐4314

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Masanobu Tanaka Dr.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 298‐53‐4314

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Akira Sekiguchi Prof. Dr.

sekiguch@staff.chem.tsukuba.ac.jp

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 298‐53‐4314

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First published: 08 September 2005

https://doi.org/10.1002/anie.200501605

Citations: 49

^†

This work was supported by a Grant‐in‐Aid for Scientific Research (Nos. 147 078 204, 16 205 008) from the Ministry of Education, Science, and Culture of Japan, a JSPS Research Fellowship for Young Scientists (M.T.), and a COE (Center of Excellence) program. We thank Professor Günther Maier for helpful discussions and advice.

Abstract

On the short side: Hexakis(trimethylsilyl)tetrahedranyltetrahedrane (see formula) was synthesized by the oxidative coupling of tris(trimethylsilyl)tetrahedranyllithium via a cuprate complex. The exocyclic CC bond between the two tetrahedrane units is the shortest known CC single bond (1.436(3) Å) owing to the increased s character of the bond orbitals.