This work was supported by Grants-in-Aid for Scientific Research (Nos. 14078204, 16205008, 17655014) from the Ministry of Education, Culture, Sports, Science, and Technology, and the COE (Center of Excellence) program.
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Communication
SiGe2 and Ge3: Cyclic Digermenes that Undergo Unexpected Ring-Expansion Reactions†
Article first published online: 7 SEP 2005
DOI: 10.1002/anie.200501885
Copyright © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Lee, V. Ya., Yasuda, H., Ichinohe, M. and Sekiguchi, A. (2005), SiGe2 and Ge3: Cyclic Digermenes that Undergo Unexpected Ring-Expansion Reactions. Angew. Chem. Int. Ed., 44: 6378–6381. doi: 10.1002/anie.200501885
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Publication History
- Issue published online: 30 SEP 2005
- Article first published online: 7 SEP 2005
- Manuscript Received: 31 MAY 2005
- Abstract
- Article
- References
- Cited By
Keywords:
- germanium;
- group 14 elements;
- ring expansion;
- silicon;
- small ring systems
The heavy cyclopropene analogues 1H-siladigermirene R4SiGe2 (1 a) and 1H-trigermirene R4Ge3 (1 b) have been obtained, and the X-ray crystal structure of 1 a shows that it forms an isosceles triangle with a highly trans-bent endocyclic Ge![[DOUBLE BOND]](http://onlinelibrarystatic.wiley.com/undisplayable_characters/00f8fe.gif)
Ge bond (bending angle 51.0(2)°). The interaction of 1 a and 1 b with CH2Cl2 unexpectedly affords the unusual four-membered-ring compounds 2 a and 2 b as a result of ring expansion (see scheme: E=Si, Ge; R=SiMetBu2).