The title compound, C(17)H(17)ClN(2)O(4), was synthesized from 3,4,5-trimethoxy-benzohydrazide and 4-chloro-benzaldehyde. In the crystal structure, packing is stabilized by intramolecular C-H⋯O and inter-molecular N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.

In the title compound, C(16)H(13)ClN(2)S, the dihedral angle between the 4-chloro-benzaldehyde moiety and the heterocyclic five-membered ring is 7.21 (17)°. In the crystal, mol-ecules are linked by weak C-H⋯π inter-actions, generating [100] chains.

The title compound, C(17)H(15)ClO, was prepared from 3,4-dimethyl-benzaldehyde and 4-chloro-hypnone by Aldol condensation. The dihedral angle formed by the two benzene rings is 48.91 (8)°. Only van der Waals forces affect the packing.

The title compound, C(10)H(8)N(4)O(4)·H(2)O, was obtained by the reaction of 5-hy-droxy-2-nitro-benzaldehyde with cyano-acetohydrazide in methanol. The non-H atoms of the hydrazone molecule are approximately coplanar, with a mean deviation from the least-squares plane of 0.056 Å. In the crystal, mol-ecules are linked by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds, generating a three-dimensional network.

[reaction: see text] The R(1) substituents at C(2) of the haloallylic sulfones 1 play a pivotal role in controlling the diastereoselectivity of the indium-mediated addition reaction to benzaldehyde to produce the homoallylic alcohols 3. The R(1) Me group of 1 prefers the chair form in the In-coordinated six-membered cyclic transition state to give anti-3a, and the R(1) Ph group of 1 favors the ...

The title compound, C(25)H(28)O(7), was prepared by the base-catalysed reaction of 3,4,5-trimethoxy-benzaldehyde with cyclo-penta-none. The mol-ecule has crystallographic twofold rotation symmetry and adopts an E-configuration about the central olefinic bonds. The two benzene rings and the central cyclo-penta-none ring are almost coplanar [dihedral angle = 4.7 (2)°].

The structure of the title complex, [ReBr(C(13)H(19)OP)(CO)(3)], displays a facial coordination of the three CO ligands and a κ(2)O,P coordination mode of the 2-diisopropyl-phosphino-benzaldehyde ligands. The Re-C bond distance for the CO ligand trans to the P atom is, due to its trans influence, elongated to 1.943 (3) Å, showing that this CO ligand is more weakly bound to the Re centre than th...

The title compound, C(17)H(18)N(2)O(5), was synthesized from 3,4,5-trimethoxy-benzohydrazide and 2-hydroxy-benzaldehyde. The dihedral angle between the planes of the two benzene rings is 29.9 (2)°. The crystal structure involves intra-molecular O-H⋯N, and inter-molecular N-H⋯O and C-H⋯O hydrogen bonds.

The title compound, C(15)H(10)F(N)O(3), was prepared from 2-nitro-acetphenone and 4-fluoro-benzaldehyde by an Aldol condensation reaction. The dihedral angle formed by the two benzene rings is 67.37 (2)°. The crystal structure is stabilized by weak inter-molecular C-H⋯O and C-H⋯F hydrogen bonds.