Magneto-structural correlations in a family of ReIVCuII chains based on the hexachlororhenate(iv) metalloligand

Six novel one-dimensional chloro-bridged ReIVCuII complexes of formula {[Cu(L)4][ReCl6]}n, where L = imidazole (Imi, 1), 1-methylimidazole (Meim, 2), 1-vinylimidazole (Vim, 3), 1-butylimidazole (Buim, 4), 1-vinyl-1,2,4-triazole (Vtri, 5) and N,N′-dimethylformamide (DMF, 6) are characterised structur...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2017-11, Vol.46 (46), p.16025-16033
Main Authors: Pedersen, Anders H, Julve, Miguel, Martínez-Lillo, José, Cano, Joan, Brechin, Euan K
Format: Article
Language:English
Subjects:
Ferromagnetism
Imidazole
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Summary:Six novel one-dimensional chloro-bridged ReIVCuII complexes of formula {[Cu(L)4][ReCl6]}n, where L = imidazole (Imi, 1), 1-methylimidazole (Meim, 2), 1-vinylimidazole (Vim, 3), 1-butylimidazole (Buim, 4), 1-vinyl-1,2,4-triazole (Vtri, 5) and N,N′-dimethylformamide (DMF, 6) are characterised structurally, magnetically and theoretically. The structures exhibit significant differences in Cu–Cl bond lengths and Re–Cl–Cu bridging angles, resulting in large differences in the nature and magnitude of magnetic exchange interactions between the ReIV and CuII ions. Theoretical calculations reveal the coupling to be primarily ferromagnetic, increasing in magnitude as the bridging angle becomes smaller and the bond lengths shorten.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt02216f