Structure and Magnetic Properties of Lanthanide Compounds with the 3,6-Di(Tert-Butyl)-1,2-Benzoquinone Radical Anion


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Abstract

Molecular and crystal structures of mononuclear lanthanide (Ln) compounds with the 3,6-di(tert-butyl)-1,2-benzoquinone (SQ) radical anion of the composition [Ln(SQ)3(THF)2] (Ln = Pr, Nd, Eu, Tb, Dy), [Ln(SQ)3(Q)], (Ln = Gd, Eu; Q – 3,6-di(tert-butyl)-1,2-benzoquinone), [La(SQ)3(Q)(THF)], [CeIV(SQ)4], [NaLn(SQ)4(THF)3]·0.25C6H14 (Ln = Gd, Tb), [NaLn(SQ)4(Q)(THF)] (Ln = La, Pr) are determined. The study of the magnetic properties of isolated heterospin solid phases reveals that intramolecular antiferromagnetic exchange interactions between unpaired electrons of SQ moieties dominate in them. At T≤2 K [Dy(SQ)3(THF)2] exhibits the properties typical of a metamagnetic compound.

About the authors

G. V. Romanenko

International Tomography Center, Siberian Branch

Author for correspondence.
Email: romanenko@tomo.nsc.ru
Russian Federation, Novosibirsk

S. V. Fokin

International Tomography Center, Siberian Branch

Email: romanenko@tomo.nsc.ru
Russian Federation, Novosibirsk

G. A. Letyagin

International Tomography Center, Siberian Branch; Novosibirsk State University

Email: romanenko@tomo.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk

A. S. Bogomyakov

International Tomography Center, Siberian Branch

Email: romanenko@tomo.nsc.ru
Russian Federation, Novosibirsk

V. I. Ovcharenko

International Tomography Center, Siberian Branch

Email: romanenko@tomo.nsc.ru
Russian Federation, Novosibirsk

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