A structural analysis of spiropyran and spirooxazine compounds and their polymorphs

Vanessa Kristina Seiler, Nikolay Tumanov, Koen Robeyns, Johan Wouters, Benoit Champagne, Tom Leyssens

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

In this work, crystal structures of commercially available photochromic compounds, i.e., spiropyrans and spirooxazines, were investigated by single-crystal X-ray diffraction. A total of five new structures were obtained via isothermal evaporation experiments under different conditions, namely 1,3,3-Trimethylindolino-benzopyrylospiran (I), 1,3,3-Trimethylindolinonaphtospirooxaxine (II), 1-(2-Hydroxyethyl)-3,3-dimethylindolino-6′-nitrobenzopyrylospiran (III), and 1,3,3-Trimethylindolino-8′-methoxybenzopyrylospiran (IVa and IVb). Since the basic structure of a spiropyran/-oxazine does not present typical hydrogen bond accepting and donating groups, this study illustrates the importance of additional functional groups connected to this kind of molecules to induce specific intermolecular interactions. Our results show that possible hydrogen bonding interactions are rather weak due to the high steric demand of these compounds. These results are supported by a search of the Cambridge structural database focused on related structures.

langue originaleAnglais
Numéro d'article84
journalCrystals
Volume7
Numéro de publication3
Les DOIs
Etat de la publicationPublié - 13 mars 2017

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    CCDC 1529773: Experimental Crystal Structure Determination

    CHAMPAGNE, B. (Contributeur), Leyssens, T. (Contributeur), Robeyns, K. (Contributeur), Seiler, V. K. (Contributeur), TUMANOV, N. (Contributeur) & WOUTERS, J. (Contributeur), Cambridge Crystallographic Data Centre, 1 janv. 2017

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    CCDC 1529776: Experimental Crystal Structure Determination

    CHAMPAGNE, B. (Contributeur), Leyssens, T. (Contributeur), Robeyns, K. (Contributeur), Seiler, V. K. (Contributeur), TUMANOV, N. (Contributeur) & WOUTERS, J. (Contributeur), Cambridge Crystallographic Data Centre, 1 janv. 2017

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    CCDC 1529775: Experimental Crystal Structure Determination

    CHAMPAGNE, B. (Contributeur), Leyssens, T. (Contributeur), Robeyns, K. (Contributeur), Seiler, V. K. (Contributeur), TUMANOV, N. (Contributeur) & WOUTERS, J. (Contributeur), Cambridge Crystallographic Data Centre, 1 janv. 2017

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