ChemInform Abstract: Small Rings. Part 93. 1,2,3,4-Tetra-tert-butyl-4-trimethylsilyl-4-sila-2-cyclobuten-1-yl: A Quantum Mechanical and ESR Study.
Abstract
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ChemInform Abstract
Irradiation of cyclopropenyltrisilane (I) in methylcyclohexane at 254 nm provides the title trimethylsilyl-silacyclobutenyl radical by cleavage of only one Si—Si bond. This radical is characterized by ESR measurements as well as by quenching with ethanethiol to provide silacyclobutene (II). The expected tetra-tert-butylsilatetrahedrane (III) or its isomer silacyclobutadiene (IV) are not observed in the reaction mixture.
