2-Amino-5-bromopyridinium 3-carboxy-4-hydroxybenzenesulfonate

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2-Amino-5-methyl­pyridinium 3-carb­oxy-4-hy­droxy­benzene­sulfonate

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2-Amino-5-chloro­pyridinium 3-carb­oxy-4-hy­droxy­benzene­sulfonate

The asymmetric unit of the title salt, C(5)H(6)ClN(2) (+)·C(7)H(5)O(6)S(-), contains two independent 2-amino-5-chloro-pyridinium cations and two independent 3-carb-oxy-4-hy-droxy-benzene-sulfonate anions. In both anions, the O atoms of the sulfonate group are disordered over two sets of positions, with occupancy ratios of 0.47 (5):0.53 (5) and 0.50 (8):0.50 (8). In each anion, an intra-molecula...

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2-Amino-5-bromo­pyridinium 3-carb­oxy-4-hy­droxy­benzene­sulfonate

The asymmetric unit of the title salt, C(5)H(6)BrN(2) (+)·C(7)H(5)O(6)S(-), contains two independent 2-amino-5-bromo-pyridinium cations and two independent 3-carb-oxy-4-hy-droxy-benzene-sulfonate anions. The hy-droxy and carboxyl groups of the anions are involved in intra-molecular O-H⋯O hydrogen bonds, which generate S(6) ring motifs. In the crystal structure, the ions are linked by N-H⋯O and ...

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5 - Amino - 3 - methyl - 1 , 2 , 4 - thiadiazole

An improved procedure for isolation of 5-amino-3-methyl-1,2,4-thiadiazole in pure form on a multi-gram scale without chromatography is reported. Its 1H and 13C-NMR and IR data are presented and previously published erroneous data corrected. The molecular structure is confirmed by X-ray diffraction which shows layers consisting of an elaborate two-dimensional hydrogen bonded network of molecules.

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ژورنال

عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online

سال: 2010

ISSN: 1600-5368

DOI: 10.1107/s1600536810033908