Crystal structure and Hirshfeld surface analysis of 6,6′-((1E,1′E)-{[1,4-phenylenebis(methylene)]bis(azanylylidene)}bis(methaneylylidene))bis(2-methoxyphenol)

The Schiff base compound, C24H24N2O4, was synthesized by the interaction of 2-hydroxy-3-methoxy benzaldehyde and 1,4-benzene dimethanamine in ethanol, and crystallizes in the monoclinic space group P21/n with Z′ = 0.5. The molecule is not planar, the 1,4-diethylbenzene and the phenol rings are twisted with respect to each other, making a dihedral angle of 74.27 (5)°. The molecular structure is stabilized by an O—H...N hydrogen bond, forming an S(6) ring motif. In the crystal, molecules are linked by C—H...O hydrogen bonds, resulting in the formation of sheets parallel to the bc plane. A Hirshfeld surface analysis was undertaken to investigate the various intermolecular contacts controlling the supramolecular topology, suggesting the H...O (18%) contacts to be the most significant interactions, whereas the H...H (50.5%) and C...H (24.3%) interactions are less significant.

Synthesis of heterocyclic ring (1,2,4-triazole) as polystyrene photo stabilizer

New heterocyclic compounds contain triazole ring (play very important role in photostabilization as UV absorber) synthesized by reaction between the di Schiff base (compound 3) with aromatic alkyl halide (Benzyl bromide) and shows there activity as photostabilizer for polystyrene through exposure to the UV-Light (300 hours). Finally Infrared spectroscopy, 1H-NMR, 13C-NMR and instrumental methods were used to characterize products and their structures.

4-Bromo-2-[({2-[(2-hydroxyethyl)amino]ethyl}imino)methyl]phenol

The new title Schiff base compound, C11H15BrN2O2, crystallizes in the monoclinic space group P21 with two independent molecules in the asymmetric unit. It was prepared by the condensation reaction of 5-bromo-2-hydroxybenzaldehyde and aminoethylethanolamine. There is an intramolecular O—H...N hydrogen bond with an S(6) ring motif. Moreover, there are intermolecular C—H...N, C—H...O and Br...O interactions in the crystal structure of the title compound.