1,4-Bis(1,3-dioxo-2-indenylidene)cyclohexane: polymorphism, gas phase oxidation and enol form mediated radical formation in the solid state

Crystallization of 1,4-bis(1,3-dioxo-2-indenylidene)cyclohexane from toluene and dichloromethane solutions afforded yellow photochromic and orange non-photochromic crystals, respectively. In situ Raman spectroscopy of the photochromic form revealed the presence of an enol form. Both forms undergo su...

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Bibliographic Details
Published inCrystEngComm Vol. 13; no. 9; pp. 3170 - 3174
Main Authors Urbanczyk-Lipkowska, Zofia, Kalicki, Przemyslaw, Gawinkowski, Sylwester, Waluk, Jacek, Yokoyama, Masashi, Tanaka, Koichi
Format Journal Article
LanguageEnglish
Published 01.01.2011
Subjects
Crystallization
Crystals
Gas phases
Polymorphism
Radicals
Sublimation
Toluene
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Summary:Crystallization of 1,4-bis(1,3-dioxo-2-indenylidene)cyclohexane from toluene and dichloromethane solutions afforded yellow photochromic and orange non-photochromic crystals, respectively. In situ Raman spectroscopy of the photochromic form revealed the presence of an enol form. Both forms undergo sublimation assisted dehydrogenation under aerobic conditions.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1466-8033
1466-8033
DOI:10.1039/C0CE00509F