1. 2-Pyridylselenenyl versus 2-Pyridyltellurenyl Halides: Symmetrical Chalcogen Bonding in the Solid State and Reactivity towards Nitriles.
- Author
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Buslov, Ivan V., Novikov, Alexander S., Khrustalev, Victor N., Grudova, Mariya V., Kubasov, Alexey S., Matsulevich, Zhanna V., Borisov, Alexander V., Lukiyanova, Julia M., Grishina, Maria M., Kirichuk, Anatoly A., Serebryanskaya, Tatiyana V., Kritchenkov, Andreii S., and Tskhovrebov, Alexander G.
- Subjects
NITRILES ,HALIDES ,BENZONITRILE ,X-ray diffraction ,COORDINATION polymers - Abstract
The synthesis of 2-pyridyltellurenyl bromide via Br
2 oxidative cleavage of the Te–Te bond of dipyridylditelluride is reported. Single-crystal X-ray diffraction analysis of 2-pyridyltellurenyl bromide demonstrated that the Te atom of 2-pyridyltellurenyl bromide was involved in four different noncovalent contacts: Te⋯Te interactions, two Te⋯Br ChB, and one Te⋯N ChB contact forming 3D supramolecular symmetrical framework. In contrast to 2-pyridylselenenyl halides, the Te congener does not react with nitriles furnishing cyclization products. 2-Pyridylselenenyl chloride was demonstrated to easily form the corresponding adduct with benzonitrile. The cyclization product was studied by the single-crystal X-ray diffraction analysis, which revealed that in contrast to earlier studied cationic 1,2,4-selenadiazoles, here we observed that the adduct with benzonitrile formed supramolecular dimers via Se⋯Se interactions in the solid state, which were never observed before for 1,2,4-selenadiazoles. [ABSTRACT FROM AUTHOR]- Published
- 2021
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