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The Role of Carbonium Ions in Color Reception
It is a fundamental property of conjugated systems to accept a proton or Lewis acid and form a stable carbonium ion. Polyenes that are protonated or add Lewis acids in this manner undergo substantial red shifts. For example, vitamin A(1) acetate absorbs at 350 mµ in neutral and at 650 mµ in acidic b...
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Formato: | Texto |
Lenguaje: | English |
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The Rockefeller University Press
1965
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2213755/ https://www.ncbi.nlm.nih.gov/pubmed/14324986 |