CHARACTERIZATION OF SCHIFF BASES DERIVED FROM 3,4-DIMETHOXYBENZALDEHYDE: THE CRYSTAL STRUCTURE OF N,N'-BIS(3,4-DIMETHOXYBENZYLIDENE)-2,2-DIMETHYLPROPANE-1,3-DIAMINE HYDRATE
A. D. Khalaji1, A. Foroghnia2, K. Fejfarova3, M. Dusek3
1Golestan University, Gorgan, Iran 2Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran 3Institute of Physics, Czech Academy of Sciences, Prague 8, Czech Republic
Keywords: diimine, Schiff base, spectroscopy, single crystal X-ray diffraction
Abstract
The Schiff base compounds N,N'-bis(3,4-dimethoxybenzylidene)-2,2-dimethylpropane-1,3-diamine hydrate, (3,4-MeO-ba) 2Mepn.H2O (1), and N,N'-bis(3,4-dimethoxybenzylidene)butane-1,4-diamine, (3,4-MeO-ba)2bn (2), with different central groups derived from 3,4-dimethoxybenzaldehyde are synthesized and characterized by elemental analysis, FT—IR and 1H NMR spectroscopy. The crystal structure of 1 is determined by single crystal X-ray diffraction. Each imino functional group (—C=N—) is coplanar with its adjacent benzene ring and the two benzene rings form a dihedral angle of 86.868(27)°. Title compound 1 crystallizes in the monoclinic space group P21/n with unit cell parameters: a = 9.0774(2) Å, b = 29.2138(5) Å, c = 8.5696(2) Å, b = 92.4756(14)°, V = 2270.41(8) Å3 and Z = 4.
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