In the title mol-ecule, C(18)H(13)Cl(2)F(3)N(4)O(2), the intra-molecular distance between the centroids of the benzene and pyridine rings is 3.953 (3) Å, and the trifluoro-methyl group is rotationally disordered over two orientations in a 0.678 (19):0.322 (19) ratio. The crystal packing exhibits weak inter-molecular C-H⋯F inter-actions.

In the title mol-ecule, C(12)H(13)N(3)O, the phenyl and the pyrazole rings make a dihedral angle of 7.5 (2)°. Inter-molecular N-H⋯O hydrogen bonds involving the amino group link the mol-ecules into a three-dimensional framework.

The conformations of the N-H and C=O bonds in the structure of the title compound, C(15)H(15)NO, are trans to each other. Furthermore, the position of the amide O atom is syn to the ortho-methyl group in the benzoyl ring. The central amide group is tilted at an angle of 59.96 (11)° to the benzoyl ring, and the benzoyl and aniline rings form a dihedral angle of 81.44 (5)°. N-H⋯O hydrogen bonds l...

The structure of the title compound, C(14)H(12)O(2), resembles those of phenyl benzoate and 4-methyl-phenyl benzoate, with similar bond parameters. The two aromatic rings make a dihedral angle of 76.0 (1)°. The plane of the central -C(=O)-O- group is twisted by 9.4 (2)° out of the plane of the benzoyl ring, and by 83.3 (1)° out of the plane of the phenyl ring. The crystal structure exhibits wea...

IN THE TITLE COMPOUND (SYSTEMATIC NAME 1,3-diiodo-4-meth-oxy-2-nitro-benzene), C(7)H(5)I(2)NO(3), the dihedral angle between the benzene ring and the nitro group is 88.0 (3)°, and the methyl group lies almost in the same plane as the ring [deviation = 0.034 (6) Å]. In the crystal, aromatic π-π stacking occurs between inversion-related rings [centroid-centroid separation = 3.865 (3) Å and slippa...

Let $(R, m)$ be a commutative noetherian local ring and let $Gamma$ be a finite group. It is proved that if $R$ admits a dualizing module, then the group ring $Rga$ has a dualizing bimodule as well. Moreover, it is shown that a finitely generated $Rga$-module $M$ has generalized Gorenstein dimension zero if and only if it has generalized Gorenstein dimension zero as an $R$-module.

In the title methaqua-lone analogue, C(23)H(20)N(2)O(2), the planes of the terminal aromatic rings [dihedral angle between them = 64.52 (7)°] approximately face the fused-ring methyl group and both are twisted with respect to the pyrimidine plane (r.m.s. deviation = 0.028 Å), forming dihedral angles of 86.9 (3) (with the 2-tolyl ring) and 65.57 (7)°. The 2-tolyl residue is disordered over two a...

The title compound, C(12)H(8)ClN(3)O(3), in the crystalline state and in solution, exists in the azo form, as predicted by density functional theory (DFT) calculations. The mol-ecule is approximately planar [the dihedral angle between the rings is 1.83 (8)°], with the nitro group slightly twisted [13.4 (2)°] relative to the benzene ring. Translationally related mol-ecules form stacks along [010...

In the title compound, C(14)H(13)NOS(2), the S atom with the methyl group is involved in an intra-molecular hydrogen bond with the amido H atom. In the crystal, the sulfanyl H atoms form inter-molecular hydrogen bonds with the O atoms, connecting the mol-ecules into zigzag chains along the c axis. The two aromatic rings exhibit a small interplanar angle of 16.03 (9)°.

In the title salt, C(8)H(9)N(2) (+)·C(7)H(7)O(3)S(-)·H(2)O, the dihedral angle between the cation and anion benzene rings is 50.1 (4)°. In the cation, the cyano-methyl group is twisted from the plane of the benzene ring [C-C-C-N = -86 (12)°]. In the crystal, the cations, anions and water mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds, forming a chain along the c axis.