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Novosibirsk, Russia

Borodin A.O.,RAS Institute of Chemistry | Kostin G.A.,Novosibirsk State University | Plusnin P.E.,Novosibirsk State University | Filatov E.Yu.,Novosibirsk State University | And 2 more authors.
European Journal of Inorganic Chemistry | Year: 2012

Five new heterometallic complexes with a {Ln[RuNO(μ-NO 2) 4(μ 3-OH)] 2Ln} (Ln = Ce, Pr, Nd, Eu) core were prepared by reaction of Na 2[RuNO(NO 2) 4OH] and lanthanide nitrates in the presence of pyridine. The crystal structures of the obtained compounds were determined by single-crystal X-ray analysis. In all complexes, Ru and Ln atoms are connected by N,O-bridging nitrite groups and OH groups. The coordination environment of Ln 3+ is completed by oxygen atoms of nitrate ions and water molecules and by nitrogen atoms of pyridine molecules. Magnetic interactions between lanthanide atoms become apparent at temperatures lower than 40-50 K, and at temperatures higher than 100 K, the dependencies of the magnetic susceptibilities of the complexes are well explained by the presence of two noninteracting paramagnetic centers. Thermal decomposition of the investigated complexes in an inert atmosphere results in a mixture of metallic ruthenium and the corresponding lanthanide oxide. Formation of mixed oxide phases RuPrO x was also detected after decomposition of the praseodymium complex. The reaction of lanthanide (Ce, Pr, Nd, Eu) nitrates with Na 2[RuNO(NO 2) 4OH] in the presence of pyridine results in the formation of tetranuclear heterometallic complexes. The crystal structures, thermal, and magnetic properties of the obtained compounds are reported. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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