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Abstract
The asymmetric unit of the title Schiff base compound, C21H26N2O4, consists of four crystallographically independent molecules, viz. A, B, C and D. The A and D, and the B and C molecules are related by a pseudo-inversion centre, and the remaining pairs of molecules differ in the orientations of one of the methoxy groups. In each independent molecule, intramolecular O—H⋯N hydrogen bonds generate two S(6) ring motifs. The dihedral angles between the benzene rings in molecules A, B, C and D are 65.86 (19), 50.41 (19), 68.59 (19) and 50.85 (19)°, respectively. In the crystal structure, molecules are linked by C—H⋯O hydrogen bonds, forming R 2 2(8) dimers. In addition, weak C—H⋯π interactions are observed.
Highlights
Data collectionR factor = 0.063; wR factor = 0.136; data-to-parameter ratio = 11.4
The asymmetric unit of the title Schiff base compound, C21H26N2O4, consists of four crystallographically independent molecules, viz. A, B, C and D
Molecules are related by a pseudo-inversion centre, and the remaining pairs of molecules differ in the orientations of one of the methoxy groups
Summary
R factor = 0.063; wR factor = 0.136; data-to-parameter ratio = 11.4. The asymmetric unit of the title Schiff base compound, C21H26N2O4, consists of four crystallographically independent molecules, viz. A, B, C and D. The A and D, and the B and C molecules are related by a pseudo-inversion centre, and the remaining pairs of molecules differ in the orientations of one of the methoxy groups. Intramolecular O—H N hydrogen bonds generate two. The dihedral angles between the benzene rings in molecules A, B, C and D are 65.86 (19), 50.41 (19), 68.59 (19) and 50.85 (19) , respectively. Molecules are linked by C—H O hydrogen bonds, forming R22(8) dimers.
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