Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 1600 - 1604 (1991)
Update date:2022-08-16
Topics:
Aldoshin, S. M.
Filipenko, O. S.
Novozhilova, M. A.
Atovmyan, L. O.
Komissarov, V. N.
Ukhin, L. Yu.
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 Angstroem 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.
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