Silyl stabilization of unsymmetrical bis
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Annette D. Allen; Ruizhi Ji; Wing-Yan Lai; Jihai Ma; Thomas T. Tidwell
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Article
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1994
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John Wiley and Sons
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English
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The bisketenes 2-phenyl and 2-methyl-3-(trimethylsilyl)-1,3-butadiene-l,4dione (8 and 10) are calculated on the basis o f additivity of substituent effects to be less stable than the 3-phenyl and 3-methyl-4-(trimethylsilyI)cyclobut-3-ene-l,2-diones (7 and 9) by 1.9 and 2.6 kcal/mol, respectively. In