Photo-and thermochromic spiranes 30*. Comparative study by X-ray structural analysis of the structure of spiropyrans of the indoline series containing a condensed furan fragment |
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| Authors: | B. S. Lukyanov A. N. Utenyshev V. V. Tkachev S. M. Aldoshin V. I. Minkin M. B. Lukyanova Yu. S. Alekseenko |
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| Affiliation: | (1) Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia;(2) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow Region, Russia;(3) Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don, 344006, Russia |
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| Abstract: | The structure of an indoline spiropyran of molecular formula C29H33NO2 has been studied by X-ray crystallographic analysis. Structural parameters have been determined for this spiropyran, containing a condensed furan fragment with a tert-butyl group, in comparison with the structure of other spiropyrans of this series. The observation in the absorption spectrum of a photoinduced cis-cis isomer is linked with its stabilization by the steric effect of the bulky tert-butyl group and the strength of barriers at 77 K. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 221–228, February, 2008. |
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| Keywords: | indoline spiropyran condensed furan fragment X-ray structural analysis |
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