Stereospecific [2+2] cycloaddition reactions of diphosphorus with alkenes |
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Authors: | Shota Nagasaki |
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Affiliation: | Department of Chemistry, Gifu University, 1-1 Yanagido Gifu 501-1193, Japan |
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Abstract: | [2+2] Cycloaddition reactions of P2 with alkenes were predicted to have concerted paths, that is, pseudoexcitation, distorted 2πs+2πs, and 2πs+2πa processes without any interventions of intermediates. The pseudoexcitation and/or distorted 2πs+2πs paths with retention of configuration of alkenes are kinetically preferred to the 2πs+2πa path with inversion of configuration. The reactions were predicted from the appreciable difference in the calculated enthalpies of activation to be stereospecific. |
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Keywords: | Diphosphorus [2+2] cycloaddition reaction Pseudoexcitation Supra-antara |
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