کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1331900 | 979022 | 2008 | 5 صفحه PDF | دانلود رایگان |
Two new quaternary salts, [Hg3Te2][UCl6] and [Hg4As2][UCl6], have been synthesized and their structures determined by single-crystal X-ray diffraction analysis. [Hg3Te2][UCl6] is the product of a reaction involving UCl4, HgCl2, and HgTe at 873 K. The compound crystallizes in space group P21/c of the monoclinic system. [Hg4As2][UCl6] results from the reaction of U, Hg2Cl2, and As at 788 K. It crystallizes in space group Pbca of the orthorhombic system. [Hg3Te2][UCl6] has a two-dimensional framework of ∞2[Hg3Te22+] layers, whereas [Hg4As2][UCl6] has a three-dimensional framework of ∞2[Hg3As2] layers interconnected by Hg atoms linearly bonded to As atoms. Both framework structures contain discrete [UCl6]2− anions between the layers. [Hg3Te2][UCl6] exhibits temperature-independent paramagnetism. The optical absorption spectra of these compounds display f–f transitions.
Views of the structures of [Hg3Te2][UCl6] and [Hg4As2][UCl6].Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 181, Issue 12, December 2008, Pages 3189–3193