In the title compound, C(21)H(18)BrNO, both heterocyclic rings, viz. the hydro-pyridine ring and the adjacent hydro-furan ring, adopt envelope conformations. These two heterocycles make a dihedral angle of 37.3 (1)°. The dihedral angle between the hydro-pyridine and benzene rings is 69.6 (1)°. In the crystal, adjacent mol-ecules are linked by pairs of inter-molecular C-H⋯O hydrogen bonds, formi...

In the title compound, C(27)H(25)NO(4), the tetra-hydro-pyridine ring adopts a half-chair conformation. The three phenyl rings form dihedral angles of 66.33 (7), 87.36 (8) and 36.90 (7)° with the least-squares plane through the tetra-hydro-pyridine ring. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯O hydrogen bond, generating an S(6) motif.

In the title compound, C(22)H(14)ClN(3), prepared by a one-pot reaction under microwave irradiation, the dihedral angles between the central pyridine ring and the pendant naphthyl and chloro-benzene ring systems are 49.2 (2) and 58.2 (3)°, respectively. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds generate R(2) (2)(8) loops. The pyridine N atom is the acceptor.

The first paper of this series (1) reported the results of tests of the carcinogenic activity of cer tam analogs of p-dimethylaminoazobenzene (DAB) in which a pyridine ring or a thiazole ring replaced one of the benzene rings of DAB. Due to the presence of the hetero atom or atoms, position isomers are possible in the heterocyclic analogs, and some of these isomers were synthesized and tested. ...

In the mol-ecule of the title compound, [ZnCl(2)(C(11)H(10)N(2))], the Zn(II) atom is four-coordinated in a distorted tetra-hedral configuration by two N atoms from the 6-methyl-2,2'-bipyridine ligand and by two Cl atoms. There are π-π contacts between the pyridine ring and the five-membered ring, and also between the pyridine rings, [centroid-centroid distances = 3.685 (3) and 3.757 (3) Å, res...

In the title mol-ecule, C(18)H(11)Cl(3)N(2)O(2), the central benzene ring is oriented at 8.44 (12) and 70.57 (11)° with respect to the terminal chloro-phenol and dichloro-pyridine rings, respectively. The mol-ecular structure is stabilized by an intra-molecular O-H⋯N hydrogen bond, which generates an S(6) ring motif. In the crystal, π-π stacking between parallel pyridine rings is observed [cent...

The cation of the title compound, [Rh(η(5)-C5Me5)Cl(C13H12ClN3)]Cl, adopts a typical piano-stool geometry. The complex is chiral at the metal and crystallizes as a racemate. Upon coordination, the hydrazinyl-idene-pyridine ligand is non-planar, an angle of 54.42 (7)° being observed between the pyridine ring and the aromatic ring of the [2-(4-chloro-phen-yl)hydrazin-1-yl-idene]ethyl group. In th...

The title compound, C(29)H(27)Cl(2)N(5)O(2), contains a central pyridine ring and two functionalized pyrazoline rings. The pyridine ring and the two attached pyrazoline rings are nearly coplanar, whereas the terminal chloro-phenyl rings are nearly perpendicular to the attached pyrazoline rings [dihedral angles = 86.78 (1) and 77.70 (1)°]. Mol-ecules are linked by weak inter-molecular C-H⋯O hydr...

In the title compound, C(15)H(15)N(3), the 1H-pyrazolo-[3,4-b]pyridine system and the phenyl ring are each individually planar, with r.m.s. deviations of 0.017 (2) and 0.011 (2) Å, respectively; the dihedral angle between the two aromatic systems is 9.33 (10)°. The crystal packing is stabilized by offset π-π stacking between parallel pyrazolo-[3,4-b]pyridine ring systems [face-to-face distance ...

In the title Schiff base compound, C(10)H(11)N(3)O, the pyridine ring is twisted with respect to the mean plane containing the hydrazine chain, making a dihedral angle of 31.40 (9)°. The NH group inter-acts with the N atom of the pyridine ring through N-H⋯N hydrogen bonds to build up a zigzag chain developing parallel to the (01) plane.