Crystal structure and Hirshfeld surface analysis of 2-chloro-N-(4-meth-oxy-phen-yl)acetamide

Crystal structure and Hirshfeld surface analysis of N-(4-nitro-phen-yl)-2-(piperidin-1-yl)acetamide (lidocaine analogue)

In the title mol-ecule, C13H17N3O3, the substituents on the phenyl ring are rotated slightly out of the mean plane of the ring but the piperidine moiety is nearly perpendicular to that plane. In the crystal, C-H⋯O hydrogen bonds form chains of mol-ecules extending along the c-axis direction, which are linked by C=O⋯π(ring) inter-actions. A Hirshfeld surface analysis showed the majority of inter-molecular inter-actions to be H⋯H contacts while O⋯H/H⋯O contacts are the second most numerous.

2-Chloro-N-(4-hy-droxy-phen-yl)acetamide

The title compound, C8H8ClNO2, is significantly distorted from planarity, with a twist angle between the planes through the hy-droxy-benzene and acetamide groups being 23.5 (2)°. This conformation is supported by intra-molecular C-H⋯O and N-H⋯Cl contacts. In the crystal, N-H⋯O hydrogen-bonding contacts between acetamide groups and O-H⋯O contacts between hydroxyl groups form tapes propagating parallel to [103].

Crystal structure and Hirshfeld surface analysis of 2-azido-N-(4-fluoro-phen-yl)acetamide

The asymmetric unit of the title compound, C8H7FN4O, consists of two independent mol-ecules differing in the orientation of the azido group. Each mol-ecule forms N-H⋯O hydrogen-bonded chains along along the c-axis direction with its symmetry-related counterparts and the chains are connected by C-F⋯π(ring), C=O⋯π(ring) and slipped π-stacking inter-actions. A Hirshfeld surface analysis of these inter-actions was performed.

2-Azido-N-(4-methyl-phen-yl)acetamide

The asymmetric unit of the title compound, C9H10N4O, comprises three independent mol-ecules, two pairs of which differ significantly in the rotational orientation of the azido group and one pair having very similar conformations; the N-N-C-C torsion angles are -173.9 (2), -102.7 (2) and -173.6 (2)°. In the crystal, each independent mol-ecule forms N-H⋯O hydrogen bonds with its glide-plane-related counterparts, forming zigzag chains extending along the c-axis direction.