Crystal structure and Hirshfeld surface analysis of N,N'-bis-(3-tert-butyl-2-hy-droxy-5-methyl-benzyl-idene)ethane-1,2-di-amine

Crystal structure and Hirshfeld surface analysis of (E)-N-(4-propyl-oxybenzyl-idene)benzo[d]thia-zol-2-amine

The title compound, C17H16N2OS, was synthesized by a condensation reaction between 2-amino benzo-thia-zole and 4-N-propoxybenzaldehyde. The benzo[d]thia-zole ring system is nearly planar (r.m.s. deviation 0.0088 Å) and makes a dihedral angle of 3.804 (12)° with the phenyl ring. The configuration about the C=N double bond is E. In the crystal structure, pairs of C-H⋯N hydrogen bonds and C-H⋯π inter-actions link the mol-ecules into inversion dimers with an R 2 2(16) ring motif. These dimers are additionally linked by weak π-π stacking inter-actions between the phenyl rings, leading to a layered arrangement parallel to (010). Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the packing arrangement are from H⋯H (47.9%) and C⋯H/H⋯C (25.6%) inter-actions.

Crystal structure and Hirshfeld surface analysis of (E)-2,4-di-tert-butyl-6-[(3-chloro-4-methyl-phenyl-imino)-meth-yl]phenol

The title Schiff base compound, C22H28ClNO, shows mirror symmetry with all its non-H atoms, except the tert-butyl groups, located on the mirror plane. There is an intra-molecular O-H⋯N hydrogen bond present forming an S(6) ring motif. In the crystal, the mol-ecules are connected by C-H⋯π inter-actions, generating a three-dimensional supra-molecular structure. Hirshfeld surface analysis and two dimensional fingerprint plots were used to analyse the inter-molecular inter-actions present in the crystal, indicating that the most important contributions for the crystal packing are from H⋯H (68.9%) and C⋯H/H⋯C (11.7%) inter-actions.

Crystal structure and Hirshfeld surface analysis of (E)-1-[(4,7-di-methyl-quinolin-2-yl)methyl-idene]semicarbazide dihydrate

In the title compound, C13H14N4O·2H2O, the organic mol-ecule is almost planar. In the crystal, the mol-ecules are linked by O-H⋯O, N-H⋯O and O-H⋯N hydrogen bonds, forming a two-dimensional network parallel to (10). Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H⋯H (55.4%), H⋯O/O⋯H (14.8%), H⋯C/C⋯H (11.7%) and H⋯N/N⋯H (8.3%) inter-actions.