Crystal structure of nicotinamide ethyl-ene glycol hemisolvate

In the title solvate, C₆H₆N₂O·0.5C₂H₆O₂, the asymmetric unit consists of one nicotinamide mol-ecule and half of an ethyl-ene glycol mol-ecule, which is completed by crystallographic inversion symmetry. The dihedral angle between the acetamide group and the pyridine ring is 21.9 (8)°. In the crystal, the components are linked by N-H⋯O and O-H⋯N hydrogen bonds into (102) sheets and weak offset π-π stacking is also observed. Hirshfeld surface analysis indicates that the most important contacts in the structure are H⋯H (42.9%), O⋯H/H⋯O (26.4%), C⋯H/H⋯C (10.6%) and N⋯H/H⋯N (9.2%).