RESUMEN
The title compound, C(10)H(8)N(8), is close to planar (r.m.s. deviation from the mean plane = 0.118â Å). In the crystal, inversion dimers linked by pairs of N-Hâ¯N hydrogen bonds generate R(2) (2)(12) loops.
RESUMEN
In the title compound, C(12)H(15)ClO(4), the molecules are linked by C-Hâ¯O interactions.
RESUMEN
In the mol-ecule of the title compound, C(18)H(18)N(4)O(2), the aromatic rings are oriented at a dihedral angle of 3.72â (3)°. In the crystal structure, inter-molecular C-Hâ¯O hydrogen bonds link the mol-ecules into centrosymmetric dimers. There are also C-Hâ¯π inter-actions.
RESUMEN
The title compound, C(13)H(18)O(4), is an inter-mediate product in the synthesis of quinazoline derivatives. Crystal structure analysis shows that the benzene-butoxy C(ar)-O-C-C torsion angle is 175.3â (2)° and that the benzene-methoxycarbonyl C(ar)-C-O-C torsion angle is 175.2â (2)°. Torsion angles close to 180° indicate that the molecule is almost planar.
RESUMEN
The asymmetric unit of the title compound, 2C(20)H(26)N(2)O(3)·H(2)O, contains two independent mol-ecules and one water mol-ecule. The azo bonds adopt trans conformations and the dihedral angles between the aromatic rings in the two organic mol-ecules are 4.5â (2) and 1.5â (2)°. In the crystal structure, O-Hâ¯O and C-Hâ¯O hydrogen bonds help to establish the packing.
RESUMEN
In the mol-ecule of the title compound, C(17)H(24)N(2)O(6), the dihedral angle between the four coplanar atoms of the piperidine ring and the benzene ring is 39.2â (1)°.
RESUMEN
In the title compound, C(30)H(32)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendant oxadiazole rings are 10.1â (2) and 6.8â (3)°. The dihedral angles between each oxadiazole ring and its adjacent benzene ring are 6.8â (2) and 5.3â (3)°.
RESUMEN
The asymmetric unit of the title compound, C(12)H(14)ClNO(6), contains two crystallographically independent mol-ecules, in which the benzene rings are oriented at a dihedral angle of 9.12â (3)°. In the crystal structure, weak inter-molecular C-Hâ¯O hydrogen bonds link the mol-ecules into a three-dimensional network.
RESUMEN
In the mol-ecule of the title compound, C(11)H(15)NO(2), the planar acetamide unit [maximum deviation of 0.0014â (6)â Å] is oriented at a dihedral angle of 19.68â (4)° with respect to the aromatic ring. An intra-molecular C-Hâ¯O inter-action results in the formation of a six-membered ring. In the crystal structure, inter-molecular N-Hâ¯O hydrogen bonds link the mol-ecules into chains along the a axis.
RESUMEN
The asymmetric unit of the title compound, C(12)H(16)ClNO(4), contains two crystallographically independent mol-ecules. The benzene rings of the two independent mol-ecules are oriented at a dihedral angle of 88.50â (3)°. Intra-molecular N-Hâ¯O hydrogen bonds involving the methoxybenzoate carbonyl group in each molecule result in the formation of two planar, six-membered rings, oriented at dihedral angles of 1.39â (3) and 0.68â (3)° with respect to the adjacent benzene rings. In the crystal structure, inter-molecular N-Hâ¯O hydrogen bonds link the mol-ecules into chains along the a axis.
RESUMEN
The complete mol-ecule of the title compound, C(4)H(3)ClN(3), is generated by crystallographic mirror symmetry, with the Cl atom, one N atom and two C atoms lying on the reflecting plane. In the crystal structure, inter-molecular N-Hâ¯N hydrogen bonds link the mol-ecules into chains propagating in [100].
RESUMEN
In the title compound, C(36)H(44)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendent oxadiazole rings are 12.7â (2) and 13.7â (2)°, and the dihedral angles between the oxadiazole rings and their adjacent benzene rings are 6.1â (2) and 17.5â (2)°. An intra-molecular C-Hâ¯O inter-action may help to establish the conformation.
RESUMEN
In the mol-ecule of the title compound, C(8)H(11)N(7)S(2), the conformation about the N=N bond is trans and the thia-diazole rings are oriented at a dihedral angle of 2.92â (3)°. In the crystal structure, inter-molecular N-Hâ¯S hydrogen bonds link the mol-ecules into chains. There are π-π contacts between the thia-diazole rings [centroid-to-centroid distances = 3.699â (3) and 3.720â (2)â Å].
RESUMEN
The asymmetric unit of the title compound, C(8)H(6)N(2)O(2), contains two independent mol-ecules, the aromatic rings of which are oriented at a dihedral angle of 1.68â (3)°. Intra-molecular C-Hâ¯O hydrogen bonds result in the formation of two non-planar six-membered rings, which adopt envelope and twisted conformations. In the crystal structure, inter-molecular C-Hâ¯O hydrogen bonds link the mol-ecules. There are π-π contacts between the benzene rings [centroid-centroid distances = 3.752â (3) and 3.874â (3)â Å].