[硝酸镨(III)(四水合物)]·二水合物的重新测定
Redetermination of [Pr(NO₃)₃(H₂O)₄]·2H₂O.
作者信息
Decadt Roel, Van Der Voort Pascal, Van Driessche Isabel, Van Deun Rik, Van Hecke Kristof
机构信息
Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 - S3, B-9000 Ghent, Belgium.
出版信息
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 1;68(Pt 7):i59-i60. doi: 10.1107/S1600536812028024. Epub 2012 Jun 27.
The structure of the title compound, tetra-aqua-tris-(nitrato-κ²O,O')praseodymium(III) dihydrate, was redetermined. The structure models derived from the previous determinations [Rumanova et al. (1964 ▶). Kristallografiya, 9, 642-654; Fuller & Jacobson (1976 ▶). Cryst. Struct. Commun.5, 349-352] were confirmed, but now with all H atoms unambiguously located, revealing a complex O-H⋯O hydrogen-bonding network, extending throughout the whole structure. In the title compound, the coordination environment of the Pr(III) atom can best be described as a distorted bicapped square anti-prism defined by three bidentate nitrate anions and four water mol-ecules. Additionally, two lattice water mol-ecules are observed in the crystal packing. The title compound is isotypic with several other lanthanide-containing nitrate analogues.
对标题化合物三水合三（硝酸根-κ²O,O'）镨（III）二水合物的结构进行了重新测定。源自先前测定[鲁马诺娃等人（1964年▶）。《晶体学》，9，642 - 654；富勒和雅各布森（1976年▶）。《晶体结构通讯》5，349 - 352]的结构模型得到了确认，但现在所有氢原子都已明确定位，揭示了一个贯穿整个结构的复杂的O - H⋯O氢键网络。在标题化合物中，Pr(III)原子的配位环境最好描述为由三个双齿硝酸根阴离子和四个水分子定义的扭曲双帽四方反棱柱。此外，在晶体堆积中观察到两个晶格水分子。标题化合物与其他几种含镧系元素的硝酸盐类似物是同晶型的。
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