Y vs. cyclic delocalization in small rin
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Timothy Clark; Dieter Wilhelm; Paul von RaguΓ© Schleyer
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Article
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1982
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Elsevier Science
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French
β 194 KB
Coulombic repulsion in four membered ring dications and dianions is more important than HUckel aromaticity and leads to a preference for Y-delocalized isomers with more favorable n charge distributions. The most significant advances in the history of organic chemistry include the concept of cyclic a