Synthesis, characterization, crystal structures of 3-hydroxy-N'- [methyl(2-pyridyl)methylene]-2-naphthohydrazide monohydrate, 3-hydroxy-N'-(3,5-dibromo-2-hydroxybenzylidene)-2-naphthohydrazide dimethylformamide solvate

摘要

Two hydrazone compounds, 3-hydroxy-N'-[methyl (2-pyridyl)methylene]-2- naphthohydrazide monohydrate (1), and 3-hydroxy-N'-(3,5-dibromo-2- hydroxybenzylidene)-2-naphthohydrazide dimethylformamide solvate (2), have been prepared and characterized by elemental analysis, IR spectra, ~1HNMR spectra, and X-ray single crystal structural determination. Compound (1) crystallizes in the monoclinic space group C2/c with unit cell dimensions a = 11.072(2) ?, b = 12.017(2) ?, c = 23.753(3) ?, β = 95.710(2)°, V = 3144.7(9) ? ~3, Z = 8, R _1 = 0.0780, and wR _2 = 0.1465. Compound (2) crystallizes in the triclinic space group P-1 with unit cell dimensions a = 7.601(2) ?, b = 16.522(4) ?, c = 17.048(3) ?, α = 92.516(11)°, β = 96.726(12)°, γ = 94.117(12)°, V = 2117.8(8) ? ~3, Z = 4, R _1 = 0.0490, and wR _2 = 0.1012. The hydrazone molecules in the compounds adopt trans configurations about the C=N double bonds. The crystal structures of the compounds are stabilized by intermolecular hydrogen bonds and π ? π stacking interactions.