N'-[(2E)-3-Phenyl-prop-2-eno-yl]benzo-hydrazide

(2E)-N'-[(E)-Benzyl-idene]-3-phenyl-prop-2-enohydrazide from synchrotron radiation

In the title compound, C(16)H(14)N(2)O, the dihedral angle between the phenyl rings is 25.48 (12)°. An E conformation is found for each of the imine [1.269 (3) Å] and ethyl-ene [1.313 (3) Å] bonds. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, leading to zigzag chains along [010]. Supra-molecular layers in the ab plane are formed, whereby the chains are linked by C-H⋯N and C-H⋯π inter-actions.

(2E)-N'-[(E)-4-Chloro-benzyl-idene]-3-phenyl-prop-2-enohydrazide monohydrate

The conformation about each of the imine and ethene bonds in the title hydrazide hydrate, C₁₆H₁₃ClN₂O·H₂O, is E. The hydrazide mol­ecule is approximately planar (r.m.s. deviation of the 20 non-H atoms = 0.172 Å). The most significant twist occurs about the ethene bond [C—C=C—C = 164.1 (5)°] and the dihedral angle formed between the benzene rings is 5.3 (2)°]. In the crystal, the presence of N—H⋯O_w and O—H⋯O_c (× 2; w = water and c = carbon­yl) hydrogen bonds leads to a supra­molecular array in the bc plane.

(2E)-N'-Benzoyl-3-(4-nitro-phen-yl)prop-2-enohydrazide

In the title compound, C(16)H(13)N(3)O(4), the dihedral angle between the terminal benzene rings is 14.02 (7)°. The carbonyl groups are anti with respect to each other, which facilitates their participation in the formation of supra-molecular chains. Each side of the -C(=O)N(H)N(H)C(=O)- residue associates with a centrosymmetrically related mol-ecule, resulting in the formation of essentially flat ten-membered {⋯O=CNN(H)}(2) synthons. The resultant chains are further consolidated in the crystal structure via C-H⋯O contacts.