Structural topology of uranyl chromate-dichromates: Preparation and crystal structures of [dabcoH2 ][(UO2)(CrO4)(Cr2O7)](H2O)2, [dmedaH2][(UO2)(CrO4)(Cr2O7)](H2O) and [pyH]4[(UO2)(CrO4)2(Cr2O7)]

被引：1
|
作者：
Nazarchuk, Evgeny, V [1 ]
Charkin, Dmitri O. [2 ]
Kalmykov, Stepan N. [2 ]
Siidra, Oleg, I [1 ]
机构：
[1] St Petersburg State Univ, Dept Crystallog, Univ Emb 7-9, St Petersburg 199034, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, GSP 1, Moscow 119991, Russia
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2021年 / 1229卷
基金：
俄罗斯科学基金会;
关键词：
BIDENTATE COORDINATION; CATION; LAYERS;
D O I：
10.1016/j.molstruc.2020.129494
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Three new uranyl chromate-dichromates, [dabcoH2 ][(UO2)(CrO4)(Cr2O7)](H2O)2 (1) , [dmedaH2] [(UO2)(CrO4)(Cr2O7)](H2O) (2) , and [pyH]4[(UO2)(CrO4)2(Cr2O7)] (3) were prepared by evaporation of aqueous solutions under ambient conditions. Compound 1 is triclinic, P 1 over bar , a = 7.2533(15), b = 10.328(2), c = 12.399(2) A, alpha = 89.292(4), beta = 88.124(4), gamma = 78.753(4) degrees, V = 910.5(3) A3, R 1 = 0.024; 2 is monoclinic, P21/c , a = 7.315(4), b = 14.684(8), c = 15.812(9) A, beta = 99.696(12) degrees, V = 1674.2(15) A3, R 1 = 0.034; 3 is orthorhombic, Pnma, a = 16.396(4), b = 21.129(6), c = 7.119(2) A, V = 2466.1(12) A3, R 1 = 0.045. In the crystal structures of 1 and 2 , the UO7 bipyramids and CrO4 tetrahedra share vertices to form 1 00of 1 [(UO2)(CrO4)(Cr2O7)]2-chains. In 3, polymerization of 1 00 00 2 [(UO2)(CrO4)2(Cr2O7)]4-layers. The protonated organic molecules are located in the interlayer and 00 connect to the inorganic backbones via a system of hydrogen bonds. We discuss the structural peculiarities of uranyl chromate-dichromate complexes and the effects of template nature on their geometrical features. [(UO2)(CrO4)] chains; the dichromate groups Cr2O7 decorate them with formation [(UO2)(CrO4)(Cr2O7)]2-chains produced (C) 2020 Elsevier B.V. All rights reserved.
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页数：11
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