Crystal structures and thermal behavior of complexes of group 13 metal halides with pyridine-type ligands

被引：0
|
作者：
T. N. Sevastianova
E. I. Davydova
I. V. Kazakov
A. Yu. Timoshkin
机构：
[1] St. Petersburg State University,Institute of Chemistry
来源：
Russian Chemical Bulletin | 2015年 / 64卷
关键词：
complexes; group 13 metal halides; pyridine; pyrazine; 4, 4´-bipyridine; crystal structure; thermal transformations;
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学科分类号：
摘要：
Complexes of group 13 metal halides with pyridine-type ligands (pyridine, pyrazine, and 4, 4´-bipyridine) have molecular, polymeric, or ionic structures containing metal atoms with a coordination number of 4, 5, or 6 depending on the component ratio, the acceptor ability of the halide, the donor ability and the coordination mode of the ligand. The strongest donor-acceptor bond is formed in the 1 : 1 molecular complexes, and their transition to the gas phase is energetically most favorable. The acceptor ability of Lewis acids in the complexes decreases in the series AlCl3 > AlBr3 > GaCl3 > GaBr3 > GaI3. The stability of the complexes with respect to homogeneous dissociation correlates with the donor proton affinity. Group 13 metal trihalides act as catalysts for the pyrolysis of ligands.
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页码：2523 / 2535
页数：12
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