Preparation X-ray characterization and reactivity of the rod-like and angular germanium- and titanium(IV)-capped iron(II) bis-clathrochelates and their mono- and bis-capped (semi)clathrochelate precursors

Chuprin, A.S.; Belova, S.A.; Vologzhanina, A.V.; Dorovatovskii, P.V.; Voloshin, Y.Z.

Авторы: Chuprin A.S., Belova S.A., Vologzhanina A.V., Dorovatovskii P.V., Voloshin Y.Z.
Журнал: Inorganic Chemistry
Том: 63
Номер: 9
Год издания: 2024
Издательство: American Chemical Society
Местоположение издательства: United States
Первая страница: 4299
Последняя страница: 4311
DOI: 10.1021/acs.inorgchem.3c04319
Аннотация: Transmetalation of the bis{triethylantimony(V)}-capped iron(II) tris-α-dioximate with n-butylboronic acid afforded the mixed antimony, boron cross-linked clathrochelate with single reactive antimony(V)-based apical fragment. This macrobicyclic precursor easily underwent the transmetalation reactions with germanium and titanium(IV) alkoxides to give the rod-like and angular FeII2MIV-trinuclear bis-clathrochelates. Those of the aforementioned diantimony(V)-capped complex with 3- and 4-carboxyphenylboronic acids afforded the monoboron-capped iron(II) semiclathrochelates, undergoing a double-cyclization (macrobicyclization) with germanium- and titanium(IV)-based capping agents. The reactions in the low-temperature range unexpectedly gave the stable 2:1 associates, formed by the bridging of two carboxyl-terminated macrobicyclic molecules of the mixed carboxylboron, triethylantimony-capped iron(II) clathrochelate with a triethylantimony(V)-based linker fragment. The obtained complexes were characterized using elemental analysis, MALDI-TOF, 1H and 13C{1H} NMR and UV–vis spectra, and single-crystal XRD experiments. The encapsulated iron(II) ion in their 3D-molecules is situated almost in the center of its FeN6-coordination polyhedron possessing a truncated trigonal-pyramidal geometry. Fe–N distances fall in the range 1.887(7)–1.945(4) Å characteristic of the low-spin iron(II) complexes. The cross-linking titanium and germanium(IV) ions in the corresponding bis-clathrochelate molecules form the octahedral MIVO6-coordination polyhedra, the MIV–O distances of which vary from 1.946(2) to 1.964(2) Å and from 1.879(7) to 1.907(6) Å, respectively.
Добавил в систему: Лебедь Екатерина Геннадьевна

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

Preparation X-ray characterization and reactivity of the rod-like and angular germanium- and titanium(IV)-capped iron(II) bis-clathrochelates and their mono- and bis-capped (semi)clathrochelate precursorsстатья

Прикрепленные файлы