Abstract
The synthesis, crystal structure analysis and characterization of 4-(4,5-dicyano-1- H-imidazolyazo)- N, N-diethylaniline (C 15H 15N 7, DIAA) were reported. Both the effects of pH value and solvent polarity upon the absorption properties of the compound were presented. The compound DIAA is monoclinic in C2/ c with a = 20.793(4) Å, b = 14.008(3) Å, c = 15.771(3) Å, β = 102.79(3)°, V = 4479.6(15) Å 3, D calc = 1.143 g/cm 3 and Z = 8. Crystal stacking scheme indicates the hydrogen bonds and intermolecular π⋯π stacking interactions; the azo molecules arrange in a head-to-tail fashion along the ac plane due to the strong ‘push–pull’ electron system.
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