4-{2-[3-(2-Ammonioacetamido)propanamido]ethyl}-1H-imidazol-3-ium dichloride

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4-{2-[3-(2-Ammonioacetamido)propanamido]ethyl}-1H-imidazol-3-ium dichloride

Mol-ecules of the title compound, Gly-β-Ala-Histamine dihydro-chloride, C(10)H(19)N(5)O(2) (2+)·2Cl(-), are linked by N-H⋯O and N-H⋯Cl hydrogen bonds into two-dimensional polymeric sheets parallel to the (011) plane, forming a stacked structure along the a axis. The parallel layers are also inter-linked alternately by different N-H⋯Cl hydrogen bonds, forming a three-dimensional framework.

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Bis[2-(4-amino­phen­yl)-4,5-dihydro-1H-imidazol-3-ium] dichloride monohydrate

The asymmetric unit of the title compound, 2C(9)H(12)N(3) (+)·2Cl(-)·H(2)O, comprises two mol-ecules, two chloride anions and one mol-ecule of crystal water. In the imidazolinium ring, the protonation contributes to delocalization of the positive charge over the two C-N bonds. Both chloride anions are acceptors of four hydrogen bonds in a flattened tetra-hedron environment. The donors are NH(2)...

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Crystal structure of 2-(1H-imidazol-3-ium-4-yl)ethanaminium dichloride, a re-determination

The crystal structure of the title mol-ecular salt, C5H11N3 (+)·2Cl(-), was redetermined. In comparison with the previous study [Bonnet et al. (1975 ▸). Bull. Soc. Fr. Mineral. Crist. 98, 208-213.], the positions of some H atoms were corrected, allowing a more accurate description of the hydrogen-bonding scheme. In addition, the absolute structure was also determined. The maximum differences in...

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2-(4-Nitro­phen­yl)-4,5-diphenyl-1H-imidazol-3-ium chloride

In the cation of the title compound, C(21)H(16)N(3)O(2) (+)·Cl(-), the N atom in the 3-position of the imidazole ring is protonated. The three pendant aromatic rings are twisted from the plane of the imidazolium ring by dihedral angles of 31.69 (14)°, 31.09 (14)° and 34.77 (14)°. In the crystal structure, N-H⋯Cl hydrogen bonds link the mol-ecules, forming a chain parallel to the b axis.

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Bis[2-(1H-imidazol-2-yl-κN 3)-1H-imidazol-3-ium]silver(I) trinitrate

The synthesis of the title salt, [Ag(C(6)H(7)N(4))(2)](NO(3))(3), was carried out employing a 1:2 molar ratio of 2,2'-biimidazole and silver nitrate respectively. The cation has crystallographically-imposed C2 symmetry with the metal atom in an almost linear coordination environment [N-Ag-N = 177.01 (17)°]. The crystal structure displays N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.

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ژورنال

عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online

سال: 2008

ISSN: 1600-5368

DOI: 10.1107/s1600536808035952