S. Aldoshin, O. Filipenko, M. A. Novozhilova
Aug 1, 1991
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0
Influential Citations
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Journal
Bulletin of the Academy of Sciences of the USSR, Division of chemical science
Abstract
The compound 2,6-di-tert-butyl-4-dimethylamino-4-(2-hydroxyphenyl)cyclohexadien-2,5-one is synthesized and its structure is studied. The thermochromism of the compound is due to cleavage on excitation of the Cspiro-N bond, which is lengthened to 1.512 Å under normal conditions, and O → N proton transfer. A deeply colored diphenoquinone and dimethylamine are formed. The Cspiro-N bond is lengthened due to mutual steric repulsion of the atoms bound to C4 and N.