A Flexible Spacer Schiff-Base (E)-N'-(5-bromo-2-hydroxybenzylidene)-4-(quinolin-8-yloxy)butanehydrazide Synthesis, Crystal Structure, and Fluorescence.

A new Schiff base compound, (E)-N'-(5-bromo-2-hydroxy- benzylidene)-4-(quinolin-8-yloxy)butanehydrazide, 1, was synthesized and characterized by elemental analysis, IR spectrum, 1HNMR, and single crystal X-ray diffraction. The asymmetric unit of 1 contains two crystallographic independent molecules with different conformations along the bond sequence linking the benzene and quinoline rings, which have a mean interplanar dihedral angle of 58.9(6) and 10.2(6)°, respectively. In the crystal, the molecules are linked through hydrogen bonds of N-H...O and C-H...O to form an infinite 1-D chain, which is further extended to a supramolecular 3-D network via Br...Br and π...π interactions. The fluorescence property of the compound 1 was investigated. [ABSTRACT FROM AUTHOR]