2-Amino-5-chloropyridinium 2-carboxyacetate
نویسندگان
چکیده
The title salt, C(5)H(6)ClN(2) (+)·C(3)H(3)O(4) (-), contains two cations and two anions in the asymmetric unit. Both 2-amino-5-chloro-pyridinium ions are protonated at their pyridine N atoms and both hydrogen malonate ions feature an intra-molecular O-H⋯O hydrogen bond, which generates an S(6) ring motif and results in a folded conformation. In the crystal structure, the cations and anions are linked via N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, forming chains propagating in [010], which are cross-linked by further C-H⋯O inter-actions.
منابع مشابه
2-Amino-5-chloropyridinium nitrate
The title structure, C(5)H(6)ClN(2) (+)·NO(3) (-), is held together by extensive hydrogen bonding between the NO(3) (-) ions and 2-amino-5-chloro-pyridinium H atoms. The cation-anion N-H⋯O hydrogen bonds link the ions into a zigzag- chain which develops parallel to the b axis. The structure may be compared with that of the related 2-amino-5-cyano-pyridinium nitrate.
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In the crystal structure of the title compound, (C(5)H(6)ClN(2))[Cr(C(2)O(4))(2)(H(2)O)(2)]·1.5H(2)O, the Cr(III) atom adopts a distorted octa-hedral geometry being coordinated by two O atoms of two cis water mol-ecules and four O atoms from two chelating oxalate dianions. The cis-diaqua-dioxalatochromate(III) anions, 2-amino-5-chloro-pyridinium cations and uncoordinated water mol-ecules are li...
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In the title salt, C(5)H(6)ClN(2) (+)·C(6)H(4)NO(3) (-)·0.85H(2)O, the pyridin-ium ring is planar, with a maximum deviation of 0.010 (2) Å. In the crystal structure, the cations, anions and water mol-ecules are linked via N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, forming a three-dimensional network.
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In the title molecular salt, C(5)H(6)ClN(2) (+)·C(7)H(6)NO(2) (-), the cations and anions are connected by cation-to-anion and anion-to-anion N-H⋯O hydrogen bonds into a three-dimensional network. The dihedral angle between the ring and the CO(2) group in the anion is 7.14 (7)°.
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The asymmetric unit of the title compound, (C(5)H(6)ClN(2))(2)[ZnCl(4)], contains two 2-amino-5-chloro-pyridinium cations and one [ZnCl(4)](2-) dianion which are held together by N-H⋯Cl and C-H⋯Cl hydrogen bonds. The [ZnCl(4)](2-) anions have a distorted tetra-hedral geometry. Weak inter-molecular π-π stacking inter-actions exist between neighbouring aromatic rings of the cations with a centroi...
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