Cocrystallization of two tautomers: 4-(1-{[4-(dimethylamino)benzylidene]hydrazono}ethyl)benzene-1,3-diol and 6-[(<i>E</i>)-1-{[4-(dimethylamino)benzylidene]hydrazino}ethylidene]-3-hydroxycyclohexa-2,4-dien-1-one (1/1)
作者:Zhen-Hua Wu、Jian-Ping Ma、Xiang-Wen Wu、Ru-Qi Huang、Yu-Bin Dong
DOI:10.1107/s0108270109006696
日期:2009.4.15
Two different tautomeric forms of a new Schiff base, C17H19-N3O2 center dot C17H19N3O2, are present in the crystal in a 1: 1 ratio, namely the enol-imine form 4-(1-[4-(dimethylamino)benzylidene]hydrazono}ethyl)benzene-1,3-diol and the keto-amine form 6-[(E)-1-[4-(dimethylamino)benzylidene]hydrazino}ethylidene]-3-hydroxycyclohexa-2,4-dien-1-one. The tautomers are formed by proton transfer between the hydroxy O atom and the imine N atom and are hydrogen bonded to each other to form a one-dimensional zigzag chain along the crystallographic b axis via intermolecular hydrogen bonds.