Crystal structures of new 4-hydroxy-N′-(3,5-diiodo-2- hydroxybenzylidene)benzohydrazide methanol and 4-hydroxy-N′-(2- methoxynaphth-1-yl-methylene)benzohydrazide dimethanol solvate

摘要

Two new hydrazone compounds C _(14)H _(10)I _2N _2O _3?CH _3OH (1) and C _(19)H _(16)N _2O _3?2CH _3OH (2) are synthesized by the condensation reactions of the equimolar quantities of 4-hydroxybenzohydrazide with 3,5-diiodo-2-hydroxybenzaldehyde and 2-methoxynaphth-1-yl-methylene respectively in methanol solutions. Compound 1 consists of a hydrazone molecule and a methanol molecule of crystallization, and compound 2 consists of a hydrazone molecule and two methanol molecules of crystallization. Both compounds are characterized by elemental analysis, IR spectra, and single crystal X-ray diffraction. As expected, each hydrazone molecule adopts an E configuration about the C=N double bond. In the crystal structures of both compounds, the hydrazone and methanol molecules are linked through intermolecular N-H?O and O-H?O hydrogen bonds, forming layers along the bc direction.