M. Unno, R. Tanaka, S. Kyushin
Feb 1, 1999
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Journal
Phosphorus Sulfur and Silicon and The Related Elements
Abstract
Hepta-t-butylcyclotetragermane 1 was synthesized from 1,2-dichloro-1,1,2,2-tetra-t-butyldigermane. The generation of hepta-t-butylcyclotetragermanyllithium 2 was observed by NMR spectra, and also confirmed by the trapping reactions. Thermal reaction of 1 gave two isomers of hexa-t-butylcyclotetragermane, 2,4-trans-3 and 2,4-cis-3. Chlorination reaction of 1 with carbon tetrachloride gave hepta-t-butylchlorocyclotetragermane 4. The structure of 1, 2,4-cis-3, and 4 was determined by X-ray crystallography.