Spin crossover in iron(II) hexafluorophosphate complexes with 2-(pyridin-2-yl)-4-(3,5-di-R-1H-pyrazol-1-yl)-6-methylpyrimidines

Spin crossover in iron(II) hexafluorophosphate complexes with 2-(pyridin-2-yl)-4-(3,5-di-R-1H-pyrazol-1-yl)-6-methylpyrimidines Научная публикация

Журнал

Inorganica Chimica Acta
ISSN: 0020-1693 , E-ISSN: 1873-3255

Вых. Данные

Год: 2017, Том: 467, Страницы: 238-243 Страниц : 6 DOI: 10.1016/j.ica.2017.08.006

Ключевые слова

Spin crossover; Iron(II); Pyrimidine; Pyridine; Pyrazole; Non-covalent interactions (Lone pair-pi, CH center dot center dot center dot pi, pi center dot center dot center dot pi and CH center dot center dot center dot F)

Авторы

Bushuev Mark B. ^1,2 , Vinogradova Katerina A. ^1,2 , Gatilov Yuri V. ^2,3 , Korolkov Ilya V. ^1,2 , Nikolaenkova Elena B. ³ , Krivopalov Viktor P. ³

Организации

1	(Данные Web of science) Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, 3 Akad Lavrentiev Ave, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia
3	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, 9 Akad Lavrentiev Ave, Novosibirsk 630090, Russia

Iron(II) hexafluorophosphate complexes with N, N, N-tridentate ligands, 2-(pyridin-2-yl)-4-(1H-pyrazol-1-yl)-6-methylpyrimidine (L-(H,L- H)) and 2-(pyridin-2-yl)-4-(3,5-dimethyl-1H-pyrazol-1-yl)-6-methylpyrimidine (L-(Me,L-Me)) were synthesized by reacting FeCl2 center dot 4H(2)O, (NBu4)PF6 and L-(H,L- H) or L-(Me,L- Me) in alcohol media. Supramolecular 3D structure of [FeL2(H,H)](PF6)(2 center dot)nH(2)O is organized by CH center dot center dot center dot pi interactions, pi...pi-stacking and CH center dot center dot center dot F hydrogen bonds. In the stricture of [FeL2(Me, Me) ](PF6)(2)center dot nH(2)O the cations and anions are assembled into a 3D network via CH center dot center dot center dot F hydrogen bonds and lone pair...pi interactions. Both complexes demonstrate high thermal stability. Under vacuum, the complex [FeL2(Me,Me)](PF6)(2)center dot nH(2)O is predominantly in the low spin state below 400 K, but at higher temperatures it shows gradual spin state switching which remains incomplete even at 495 K. Under vacuum or in sealed ampoule in the first heating run the complex [FeL2(Me,Me)](PF6)(2)center dot nH(2)O shows abrupt spin state switching related to dehydration near 400 K. On further thermal cycling under vacuum the complex demonstrates gradual spin crossover curve centered at ca. 250 K, whereas in sealed ampoules this compound demonstrates a very abrupt transition near 250 K. (C) 2017 Elsevier B.V. All rights reserved.

Bushuev M.B. , Vinogradova K.A. , Gatilov Y.V. , Korolkov I.V. , Nikolaenkova E.B. , Krivopalov V.P.
Spin crossover in iron(II) hexafluorophosphate complexes with 2-(pyridin-2-yl)-4-(3,5-di-R-1H-pyrazol-1-yl)-6-methylpyrimidines
Inorganica Chimica Acta. 2017. V.467. P.238-243. DOI: 10.1016/j.ica.2017.08.006 WOS Scopus РИНЦ

Опубликована в печати:

1 окт. 2017 г.

Web of science	WOS:000410686700032
Scopus	2-s2.0-85027396436
РИНЦ	31050031
OpenAlex	W2744506058