RESUMEN
In the title compound, C(9)H(11)N(2)O(4) (+)·ClO(4) (-), the organic cations form centrosymmetric dimers via a pair of O-Hâ¯O hydrogen bonds between the carboxyl groups. In the crystal, N-Hâ¯O inter-actions between the protonated amine group and the perchlorate anions and the nitro group connect the components into a two-dimensional network parallel to (001).
RESUMEN
In the crystal of the title compound, C(8)H(8)NO(4) (+)·NO(3) (-)·2H(2)O, the 5-ammonio-isophthalic acid cations, the nitrate anions and the water mol-ecules are linked by N-Hâ¯O, O-Hâ¯O and C-H â¯O hydrogen bonds into a three-dimensional network. The structure is further stabilized by aromatic π-π stacking inter-actions, with centroid-centroid separations of 3.827â (2)â Å.
RESUMEN
The crystal packing of the title compound, C(8)H(12)N(+)·ClO(4) (-), is stabilized by N-Hâ¯O hydrogen bonds, the protonated amine group acting as a hydrogen-bond donor with the perchlorate O atoms as acceptors. These connect neighbouring cations and anions, forming a two-dimensional network. Variable-temperature dielectric constant measurements on the salt indicated that no distinct phase transition occurred within the measured temperature range of 80-293â K.
RESUMEN
In the cation of the title compound, C(9)H(11)N(2)O(4) (+)·ClO(4) (-), the conformation is stabilized by an intra-molecular N-Hâ¯O hydrogen bond. In the crystal packing, centrosymmetrically related cations inter-act through inter-molecular O-Hâ¯O hydrogen bonds involving the carb-oxy groups, forming dimers. The dimers and the perchlorate anions are further linked into layers parallel to the ab plane by C-Hâ¯O and N-Hâ¯O hydrogen-bonding inter-actions.
RESUMEN
In the title compound, H(3)O(+)·C(8)H(5)O(5) (-), neighbouring cations and anions are linked by O-Hâ¯O hydrogen bonds, forming a one-dimensional chain framework along [001]. The crystal structure is further stabilized by π-π inter-actions, with centroid-centroid distances of 3.734â (3)â Å.
RESUMEN
The crystal structure of the title compound, C(6)H(10)N(2) (2+)·2Cl(-), has been reported previously in the non-standard setting P2(1)/a [Genet (1965 â¶). Bull. Soc. Fr. Miner. Crist.88, 463-470], with an R value of 0.16. The current redetermination improves significantly the precision of the geometric parameters. In the crystal packing, cations and anions are linked by inter-molecular N-Hâ¯Cl and C-Hâ¯Cl hydrogen bonds into a three-dimensional network.
RESUMEN
In the title salt, C(9)H(12)NO(2) (+)·NO(3) (-), the cation and anion are linked by a bifurcated N-Hâ¯(O,O) hydrogen bond. The crystal packing is stabilized by inter-molecular N-Hâ¯O, O-Hâ¯O and C-Hâ¯O hydrogen bonds, which connect neighbouring cations and anions, resulting in a two-dimensional network.
RESUMEN
The title compound, [CdCl(2)(C(6)H(8)N(2))](n), is a coordination polymer prepared by the hydro-thermal reaction of cadmium chloride and o-diamino-benzene. The cadmium cation, located on an inversion center, is octa-hedrally coordinated by four Cl atoms at equatorial sites and two N atoms from two ligands at the axial sites. Cd atoms are bridged by Cl atoms, forming extended chains parallel to [010]. Neighboring chains are connected by N-Hâ¯Cl hydrogen bonds.
RESUMEN
In the title compound, C(8)H(6)N(2)O(2), the nitro group is rotated by 10.2â (2)° out of the plane of the benzene ring. The crystal structure is stabilized by van der Waals inter-actions.
RESUMEN
The title compound, C(32)H(20)N(2)O(6), was synthesized by the reaction of 1,1'-binaphthyl-2,2'-diol and 4-nitro-phenol in the presence of K(2)CO(3). The two naphthalene systems make a dihedral angle of 73.70â (5)°. The crystal packing involves mol-ecules connected by C-Hâ¯O hydrogen bonds into a chain along the c axis.