Vacuum sublimation of magnesium and barium hexafluoroacetylacetonate mixtures. Crystal structure of magnesium hexafluoroacetylacetonate dihydrateстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The behavior of magnesium and barium hexafluoroacetylacetonate mixtures on heating was studied by thermal analysis and vacuum sublimation methods. It was demonstrated that the transfer of the mixture components into the gas phase and the sublimation of the pure compounds proceed under almost the same conditions. The lack of a notable mutual influence is explained by the formation of a mechanical mixture of the components in the course of their crystallization. X-ray structural analysis was carried out for magnesium hexafluoroacetylacetonate dihydrate Mg(Hfa)2(H2O)2: space group C2/c, a = 21.419(8), b = 8.266(4), c=9.777(4) Å, beta = 96.39, V = 1720.3(12) Å3, Z = 4, R1 = 0.0550. The magnesium atom has a distorted octahedral coordination environment with distances Mg–O 2.052.07 Å.
http://www.maik.ru/cgi-perl/search.pl?type=abstract&name=cochem&number=6&year=99&page=383