On the mechanism of thermal 2+2 cycloaddition reactions involving fluoro-olefins |
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| Authors: | DW Roberts |
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| Institution: | Unilever Research Port Sunlight Laboratory Bebington, Wirral, Merseyside, L63 3JW, UK. |
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| Abstract: | A concerted 2s + 2a mechanism is proposed for cycloaddtion reactions of fluoro-olefins to give substituted cyclobutanes. Published data on relative rates, orientation and stereochemical course of these reactions are reconsidered and it is concluded that the concerted 2s + 2a mechanism provides a more satisfactory rationâle than the commonly accepted diradical mechanism. |
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