| Autor: |
Kuz'mina, Lyudmila G., Vedernikov, Artem I., Howard, Judith A. K., Bezzubov, Stanislav I., Alfimov, Michael V., Gromov, Sergey P. |
| Předmět: |
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| Zdroj: |
CrystEngComm; 10/21/2016, Vol. 18 Issue 39, p7506-7515, 10p |
| Abstrakt: |
New styryl dyes of the 2-benzoselenazole series which contain iodide, triiodide, and tosylate anions were synthesized. Crystals of these compounds were grown in different crystal forms – solvent free and hydroquinone, benzene or ethyl acetate solvated ones. X-ray structural studies of the crystals shows that those containing tosylate and triiodide anions form the centrosymmetrically related stacking motif, typical for styryl dye cations and favorable for [2 + 2] photocycloaddition (PCA) reactions. This reaction takes place in crystals with tosylate anions as a single crystal-to-single crystal process. On the contrary, in the triiodide dye crystals, the PCA reaction is lacking, probably due to a weak directional interaction of the selenium atoms with the anions. The iodide dye crystals demonstrate non-typical packing for styryl dyes and manifest as a two-dimensional close packing motif of the cations which is unfavorable for cycloaddition. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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