Spectroscopic characterization and room-temperature structure of bis(4-aminopyridinium) dichromate

被引：0

作者：

R. Ben Smail

H. Chebbi

B. R. Srinivasan

M. F. Zid

机构：

[1] University of Carthage,Department of Chemistry

[2] Nabeul Preparatory Engineering Institute,undefined

[3] University Campus,undefined

[4] University of Tunis,undefined

[5] Tunis Preparatory Engineering Institute,undefined

[6] University of Tunis El Manar,undefined

[7] Faculty of Sciences of Tunis,undefined

[8] Department of Chemistry,undefined

[9] Laboratory of Materials,undefined

[10] Crystallochemistry and Applied Thermodynamics,undefined

[11] Farhat Hached University Campus,undefined

[12] Goa University,undefined

来源：

Journal of Structural Chemistry | 2017年 / 58卷

关键词：

crystal structure; infrared spectroscopy; bis(4-aminopyridinium) dichromate;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Crystals of bis(4-aminopyridinium) dichromate (C5H7N2)2[Cr2O7] (1) were isolated via slow solvent evaporation and characterized by energy dispersive spectroscopy (EDS), infrared (IR) and ultratviolet-visible (UV-Vis) spectroscopy, and single crystal X-ray diffraction. The room-temperature (RT; 298 K) phase of 1 crystallizes in the monoclinic space group P21/m. Its asymmetric unit consists of two crystallographically independent 4-aminopyridinium cations (A and B) and two halves of symmetry-independent dichromate anions (A and B). Cations and anions are linked with the aid of several moderate N–H⋯O hydrogen bonds and weak C–H⋯O interactions resulting in a three-dimensional supramolecular network. The crystal structure is further stabilized by extensive π–π stacking interactions between adjacent pyridine rings. A comparison of the structure of the RT phase of 1 and that of the low temperature (LT; 150 K) phase is described.

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页码：724 / 733

页数：9

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