Unusual reactions of isolable dialkylgermylene and -stannylene with galvinoxyl radical |
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Authors: | Masuda H Iwamoto T Kabuto C Kira M |
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Institution: | (1) Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan |
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Abstract: | The reactions of isolable dialkylgermylene and -stannylene with a galvinoxyl radical were found to give rather unusual cyclic compounds in high yields via intermediate adduct radicals. The structures of the cyclic compounds were determined by X-ray crystallography. We propose a concerted cyclization mechanism in which the abstraction of a hydrogen atom from the tert-butyl group by the galvinoxyl radical is accompanied by the simultaneous attack of the germyl radical center to the tert-butyl carbon atom. |
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Keywords: | germylene stannylene galvinoxyl radical cyclization |
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