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Investigation of H-bonding of p-(3-carboxymethyl-1-adamantyl)calix[6]arene by IR spectroscopyстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 апреля 2022 г.
- Авторы: Furer V.L., Potapova L.I., Chachkov D.V., Vatsouro I.M., Kovalev V.V., Shokova E.A., Kovalenko V.I.
- Журнал: Journal of Molecular Structure
- Том: 1248
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 131472
- DOI: 10.1016/j.molstruc.2021.131472
- Аннотация: IR spectra of calix[6]arene with adamantylacetic acid (1) and adamantyl (2) substituents along the upper rim of the molecule were recorded. The spectra of compounds 1 and 2 in the crystalline state in the region of the stretching vibrations of the hydroxyl groups contain a strong band at 3187 cm–1, which changes to 3118 cm–1 in the spectra of a dilute solution in CCl4. The formation of cyclic dimers between adjacent carboxyl groups was found. Because we are dealing with very dilute solutions, it can be assumed that the H-bonds between the carboxyl groups are intramolecular. Heating a sample of 1 to a temperature of 180° C destroys a small part of the H-bonds between neighboring carboxyl groups, as evidenced by the appearance of a weak band at 3535 cm–1. However, after cooling to room temperature, the H-bonds between the carboxyl groups are restored.Carboxyl groups form dimeric complexes. The calculation has shown that molecules 1 and 2 take on the conformation of a compressed cone.
- Добавил в систему: Ковалев Владимир Васильевич