|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Stereochemistry of the cis-Tetrafluoro Complexes of Titanium with 1-Ac-2-[Ph2P(O)]-Cyclohexane (1RS,2SR) Stereoisomers in СН2Сl2статья
- Авторы: Il’in E.G., Parshakov A.S., Privalov V.I., Churakov A.V., Bodrin G.V., Goryunov E.I.
- Журнал: Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
- Том: 50
- Номер: 2
- Год издания: 2024
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 137
- Последняя страница: 144
- DOI: 10.1134/S1070328423700719
- Аннотация: The monodentate phosphoryl-containing ligand 1-Ac-2-[Ph2P(O)]-cyclohexane (L) bearing twoasymmetric carbon atoms is synthesized. The study of its crystal structure shows that L is a racemic mixtureof (1R,2S) and (1S,2R) stereoisomers. The complex formation of L with TiF4 in СН2Сl2 is studied by 19F{1Н}and 31Р{1Н} NMR spectroscopy. The compositions of the complexes formed in the solution are determined.Racemic and meso-diastereomers of the octahedral complex cis-TiF4L2 are formed in the solution as foundby an analysis of the 19F and 31Р NMR spectra taking into account the concept of heterotropy of organic compounds.The influence of the optical configuration of stereoisomers of the monodentate ligand coexisting inthe coordination sphere of the [MF4L2] octahedral tetrafluoro complexes of transition d0 metals on thechemical shifts of the fluorine atoms arranged in the trans positions relative to each other is shown. In themeso-diastereomer of cis-TiF4L2, this results in a nonequivalence of the fluorine atoms on the F–Ti–F' ordinateof the octahedron, and the spin-spin coupling constant JFF' = 286.1 Hz is observed in the 19F{1H} NMRspectrum.
- Добавил в систему: Горюнов Евгений Иосифович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | S1070328423700719.pdf | 650,0 КБ | 4 сентября 2024 [GoryunovEI] | |
| 2. | Экспертное заключение | Apr13-2023.pdf | 126,7 КБ | 4 сентября 2024 [GoryunovEI] |