STRUCTURE OF LANTHANUM(III) TRIS-DIPIVALOYLMETHANATE
Yuikhan Lu1,2, S. A. Mosyagina2,3, P. A. Stabnikov3, N. I. Alferova3, I. V. Korol'kov2,3, N. V. Pervukhina3, N. B. Morozova3
1Chinese-Russian Heilongjiang University, Heilongjiang, P. R. China
2Novosibirsk National Research State University, Novosibirsk, Russia
3Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: синтез, дипивалоилметанаты Ln(III), кристаллическая структура, летучесть, synthesis, Ln(III) dipivaloylmethanates, crystal structure, volatility
Abstract
A series of Ln(III) dipivaloylmethanates of the composition Ln(dpm)3 (Ln = La, Tm, Yb) is obtained. It is established that Tm(dpm)3 and Yb(dpm)3 complexes are isostructural with Lu(dpm)3. The crystal structure of [La(dpm)3]2 at 150(2) K is determined (space group P21/n, a = 12.4412(5) Å, b = 28.0579(12) Å, с = 21.9533(8) Å, β = 105.796(2)°, V = 7373.9(5) Å3, Z = 4). The studied compound is isostructural with [Pr(dpm)3]2, [Eu(dpm)3]2, [Gd(dpm)3]2, and [Tb(dpm)3]2 complexes. The crystal structure of the complex is formed by dimeric [La(dpm)3]2 molecules. Thermogravimetric investigations show that the volatility of Ln(dpm)3 increases in the series from [La(dpm)3]2 to Yb(dpm)3. Melting points of the complexes are close to the known literature data.
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