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Strong magnetic coupling of spins in Fe(ii) dimers with differently charged thioindigo ligands

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Abstract

A first coordination {[2.2.2]cryptand(K+)}2{FeII(TI˙)(TI2−)}2·2C6H4Cl2 (1) complex of iron(II) containing radical anions and dianions of thioindigo (TI) was obtained. The complex has two high-spin FeII centers bound by two oxygen atoms, and the TI˙ radical anions are coordinated to each FeII. As a result, the 4-spin system consisting of TI˙ (S = 1/2)–FeII (S = 2)–FeII (S = 2)–TI˙ (S = 1/2) coupled spins is formed within a dimer with strong FeII–FeII (J = −51.1 cm−1) and weaker FeII–TI˙ interactions of (J = −35.4 cm−1).

Graphical abstract: Strong magnetic coupling of spins in Fe(ii) dimers with differently charged thioindigo ligands

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Supplementary files

Article information


Submitted
05 Apr 2020
Accepted
19 May 2020
First published
19 May 2020

Dalton Trans., 2020, Advance Article
Article type
Communication

Strong magnetic coupling of spins in Fe(II) dimers with differently charged thioindigo ligands

D. V. Konarev, A. V. Kuzmin, M. S. Batov, S. S. Khasanov, A. Otsuka, H. Yamochi, H. Kitagawa and R. N. Lyubovskaya, Dalton Trans., 2020, Advance Article , DOI: 10.1039/D0DT01262A

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