4-[2-(Cyclo-hexa-1,4-dien-1-yl)eth-oxy]benzene-1,2-dicarbonitrile.

In the title compound, C(16)H(14)N(2)O, the dihedral angle between the aromatic rings is 70.23 (6)°. The linking chain has a zigzag conformation.

Dimethyl 8-acetyl-2-methyl-1,2-dihydro-quinoline-2,4-dicarboxyl-ate.

In the title compound, C(16)H(17)NO(5), the six-membered N-containing ring has a half-boat form; the spiro C atom deviates by 0.34 (2) Å from the plane (r.m.

4-Methyl-N-[(S)-1-phenyl-eth-yl]benzene-sulfonamide.

In the title compound, C(15)H(17)NO(2)S, the dihedral angle between the aromatic rings is 14.47 (8)°. The mol-ecule is bent at the N atom, with a C-SO2-NH-C torsion angle of 79.

N-[(Z)-4-Meth-oxy-benzyl-idene](meth-oxy-carbon-yl)methanamine oxide.

The title compound, C(11)H(13)NO(4), contains a nitrone group, C=N-O-R, the geometry of which shows a Z configuration with near planarity (r.m.s.

17,18-Dibromo-8-methyl-4,12-ditosyl-3,4,5,6,7,8,9,10,11,12,13,14-dodeca-hydro-2H-benzo[b][1,4,7,11,15]dioxatriaza-cyclo-hepta-decine.

In the title compound, C(31)H(39)Br(2)N(3)O(6)S(2), a 17-membered aza-macrocyclic ligand containing two ether O and three aza N atoms, the three pendant aromatic rings form an 'E' shape. The dihedral angles between the central benzene ring and the side ones are 17.8 (3) and 7.

3-[(E)-(4-Ethyl-phen-yl)imino-meth-yl]benzene-1,2-diol.

The title compound, C(15)H(15)NO(2), adopts the enol-imine tautomeric form. The dihedral angle between the two benzene rings is 48.1 (1)°.

(E)-3-[(4-Butyl-phen-yl)imino-meth-yl]benzene-1,2-diol.

The title compound, C(17)H(19)NO(2), exists as an enol-imine tautomer. The dihedral angle between the two benzene rings is 4.6 (2)°.

(E)-4-Meth-oxy-2-[3-(trifluoro-meth-yl)phenyl-imino-meth-yl]phenol.

The title compound, C(15)H(12)F(3)NO(2), adopts the phenol-imine tautomeric form, with the H atom attached to oxygen rather than to nitro-gen. There are two independent mol-ecules aligned nearly parallel in the asymmetric unit with their trifloramethyl groups pointing in opposite directions. The dihedral angles between the aromatic rings are 40.

(E)-3-[(3-Bromo-phen-yl)imino-meth-yl]benzene-1,2-diol: a combined X-ray and computational structural study.

The title compound, C(13)H(10)BrNO(2), exists as an enol-imine form in the crystal and adopts an E configuration with respect to the C=N double bond. The mol-ecule is close to planar, with a dihedral angle of 6.88 (14)° between the aromatic rings.