Synthesis and characterization of 2-amino-3-methylpyridinium dihydrogenomonoarsenate

被引：25
作者：
Oueslati, A
Rayes, A
Ben Nasr, C [1 ]
Lefebvre, F
机构：
[1] Fac Sci Bizerte, Lab Chim Mat, Zarzouna 7021, Tunisia
[2] Ecole Super Chim Phys Elect, LCOMS, Villeurbanne, France
来源：
MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 10期
关键词：
X-ray diffraction; nuclear magnetic resonance; crystal structure;
D O I：
10.1016/j.materresbull.2005.05.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new crystal of 2-amino-3-methylpyridinium dihydrogenomonoarsenate has been prepared and characterized by X-ray crystallography, thermal analysis and spectroscopic studies. This compound crystallizes in the triclinic space group P (1) over bar with a = 7.2689 (2) angstrom, b = 8.0975 (2) angstrom, c = 8.3969 (4) angstrom, alpha = 77.09 (3)degrees, beta = 79.20 (3)degrees, gamma = 88.16 (2)degrees, V = 473.19 (3) angstrom(3), Z = 2. The crystal structure was solved and refined to R = 0.027 with 3375 independent reflections. The atomic arrangement can be described as (H2AsO4-)(n), polymeric chains anchoring the 2-amino-3-methylpyridinium cations through short hydrogen bonds. All the ring atoms of the organic entity are coplanar. The exocyclic N atom is an electron receiving center, which is consistent with features of imino resonance evidenced by bond lengths and angles. Solid-state C-13 and N-15 CP-MAS-NMR spectroscopies are in agreement with the X-ray structure. Ab initio calculations allow the attribution of carbons and nitrogen to the independent crystallographic sites. (C) 2005 Elsevier Ltd. All rights reserved.
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页码：1680 / 1689
页数：10
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