The Effect of Substituents on the Ring Closure Reaction of Photo Activated Diarylnaphthopyrans
1997; Volume: 297; Issue: 1 Linguagem: Inglês
10.1080/10587259708036116
ISSN1058-725X
Autores Tópico(s)Organic Chemistry Cycloaddition Reactions
ResumoAbstract Abstract A kinetic study of a few photochromic diarylnaphthopyrans is reported. Upon exposure to ultraviolet radiation, the diarylnaphthopyran derivatives are transformed into open chain, colored forms, which undergo ring closure into the colorless pyran forms. The rate of the ring closure has been determined for a few diarylnaphthopyrans. The effect of substituents on this reaction is briefly investigated.
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