The aromatic ring of the title compound, C(6)H(3)ClN(2)O(5), is almost planar (r.m.s. deviation = 0.007 Å); one nitro substituent is nearly coplanar with the ring [dihedral angle = 3(1)°], whereas the other is twisted [dihedral angle = 36 (1)°]. The phenol OH group is intra-molecularly hydrogen bonded to the nitro group that is coplanar with the ring, generating an S(6) graph-set motif.

The title compound, C8H9ClO, packs with two independent mol-ecules in the asymmetric unit, without significant differences in corresponding bond lengths and angles, with the ethyl group in each oriented nearly perpendicular to the aromatic ring having ring-to-side chain torsion angles of 81.14 (18) and -81.06 (19)°. In the crystal, mol-ecules form an O-H⋯O hydrogen-bonded chain extending along ...

New N-allyl/propargyl 4-substituted 1,2,3,4-tetrahydroquinolines derivatives were efficiently synthesized using acid-catalyzed three components cationic imino Diels-Alder reaction (70-95%). All compounds were tested in vitro as dual acetylcholinesterase and butyryl-cholinesterase inhibitors and their potential binding modes, and affinity, were predicted by molecular docking and binding free ene...

In the crystal of the title compound, C(12)H(10)ClNO(2)S, the asymmetric unit contains two independent mol-ecules. The N-C bonds in the C-SO(2)-NH-C segments have gauche torsions with respect to the S=O bonds. The mol-ecules are twisted at the S atoms with C-SO(2)-NH-C torsion angles of -53.8 (3) and -63.4 (3)° in the two mol-ecules. The benzene rings are tilted relative to each other by 69.1 (...

In the title compound, C(7)H(3)ClN(2)O(2), the Cl, C and N atoms are coplanar with the aromatic ring. In the crystal structure, weak inter-molecular C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules. The π-π contact between the benzene rings, [centroid-centroid distances = 3.912 (3) Å] may further stabilize the structure.

There are two mol-ecules in the asymmetric unit of the title compound, C(8)H(8)ClNO, which are linked in the crystal structure via N-H⋯O hydrogen bonds into chains along the b axis. C-H⋯O contacts also occur. The benzene ring makes dihedral angles of 5.9 (1) and 16.7 (1)°with the attached amide group in the two independent molecules.

In the title compound, C(13)H(10)ClNO, the dihedral angle between the two benzene rings is 59.6 (1)°. The crystal structure features N-H⋯O hydrogen bonds, which link the mol-ecules into C(4) chains running along the a axis.