Structures, magnetic properties, and EPR studies of tetranuclear copper(II) complexes [Cu4(OH)4L4]4+ (L = bpa, bipy) stabilized by anions containing decahydro-closo-decaborate anion

Malinina, E.A.; Vologzhanina, A.V.; Avdeeva, V.V.; Goeva, L.V.; Efimov, N.N.; Ugolkova, E.A.; Minin, V.V.; Kuznetsov, N.T.

Авторы: Malinina Elena A., Vologzhanina Anna V., Avdeeva Varvara V., Goeva Lyudmila V., Efimov Nikolay N., Ugolkova Elena A., Minin Vadim V., Kuznetsov Nikolay T.
Журнал: Polyhedron
Том: 183
Номер: 6
Год издания: 2020
Издательство: Pergamon Press
Местоположение издательства: United States
Первая страница: 114540
DOI: 10.1016/j.poly.2020.114540
Аннотация: Tetranuclear copper(II) cationic complex [Cu4(bpa)4(OH)4]4+ stabilized by chained polymeric silver(I) anionic complex {Ag[B10H10]}nn− and two DMF molecules with the general formula {[Cu4(bpa)4(OH)4(DMF)2][Ag[B10H10]]4·10 DMF}n has been synthesized. The target complex has been prepared in one step when [Ag2[B10H10]] was allowed to react with CuCl in the presence of bpa in DMF; the reaction has been performed in air. Copper(I) has been oxidized in air in the presence of bpa to form the tetranuclear cationic complex. The target compound has been studied by IR spectroscopy as well as powder and single crystal X-ray diffractions. The electronic structure and magnetic properties of the complex have been studied by EPR spectroscopy and magnetic susceptibility methods and the obtained data have been compared with those obtained for related tetranuclear bipy-contained copper(II) complexes [Cu4(bipy)4(OH)4][Cu2[B10H10]3]·4CH3CN and {[Cu4(bipy)4(OH)4][B10H10]2(DMSO)2} with the known structures. The magnetic properties of three compounds under study are different; the magnetic moment has been found to increase, to decrease and remain unchanged when increasing temperature.
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Structures, magnetic properties, and EPR studies of tetranuclear copper(II) complexes [Cu4(OH)4L4]4+ (L = bpa, bipy) stabilized by anions containing decahydro-closo-decaborate anionстатья

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