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Cyclotrisilene, (tBu2MeSi)4Si3, was reacted with phenylacetylene to produce an unusual 1,2,5-trisilabicyclo[3.2.0]hepta-3,6-diene derivative, whose structure was determined by NMR spectroscopy and X-ray crystallography; a mechanism for its formation is proposed.
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Ichinohe et al. (2001) studied this question.
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