Lanthanum(III), Samarium(III), Europium(III), and Thulium(III) Binuclear Acetates and Pivalates : Synthesis , Structure , Magnetic Properties , and Solid-Phase Thermolysisстатья
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Дата последнего поиска статьи во внешних источниках: 7 декабря 2017 г.
Аннотация:The reaction of M 2O 3 with excess acetic acid yields binuclear acetate complexes M 2O(η 1,η 2- OOCCH 3) 2(η 2-OOCCH 3) 4(H 2O) 4·xH 2O (M = Sm (1), Eu (2), Tm (3)), in which the two metal atoms are nine-coordinated and linked through two tridentate chelate-bridging acetato groups. The reaction of binuclear acetates where M = Sm (1), Eu (2), or La (4) with excess pivalic acid yields binuclear pivalates M 2(μ 2-OOCCMe 3) 4(OOCCMe 3) 2(HOOCCMe 3) 4·HOOCCMe 3 (M = La (5), Sm (6), and Eu (7)), in which the two metal atoms are eight-coordinated and linked through four bridging trimethylacetate groups. Binuclear complex 5 is characterized by X-ray structure analysis; complexes 1, 2, 6, and 7 (with M = Sm, Eu), by X-ray powder diffraction. The magnetic properties and thermolysis of the complexes are studied, as well as the phase composition of the solid thermolysis products.