Crystal structure of 4-({5-[(E)-(3,5-di-fluoro-phen-yl)diazen-yl]-2-hy-droxy-benzyl-idene}amino)-2,2,6,6-tetra-methyl-piperidin-1-ox-yl.
The asymmetric unit of the title compound, C22H25F2N4O2, contains two crystallographically independent mol-ecules. In one mol-ecule, the two benzene rings are oriented at a dihedral angle of 1.93 (10)° and in the other mol-ecule the corresponding dihedral angle is 7.19 (9)°. The piperidine rings in the two mol-ecules adopt a similar distorted chair conformation, and both have pseudo-mirror planes passing through the N-O bonds. An intra-molecular O-H⋯N hydrogen bond between the hy-droxy group and the imine N atom is observed in both mol-ecules. In the crystal, weak C-H⋯O and C-H⋯F hydrogen bonds, enclosing R 2 (2)(6) ring motifs, and weak π-π stacking inter-actions link the mol-ecules into a three-dimensional supra-molecular network, with centroid-to-centroid distances between the nearly parallel phenyl and benzene rings of adjacent mol-ecules of 3.975 (2) and 3.782 (2) Å.
Department of Chemistry, Harran University, 63300 Osmanbey, Şanlıurfa, Turkey.
Ramazan
R
Tatsız
Department of Chemistry, Harran University, 63300 Osmanbey, Şanlıurfa, Turkey.
Veli T
VT
Kasumov
Department of Science Education, Aksaray University, 68100 Aksaray, Turkey.
Tuncay
T
Tunc
Department of Physics, Hacettepe University, 06800 Beytepe, Ankara, Turkey.
Tuncer
T
Hökelek
Schiff base compounds; crystal structure; hydrogen bonding; spin-labeled compounds; π–π stacking