Figure 5
(a) The hydrogen bonding present in izact–1nta, showing the typical hydrogen bonding in the structures of izact–1nta and izbt–1nta. The packing present in the crystal structure of (b) izact–1nta and (c) izbt–1nta, with the H atoms omitted for clarity. In parts (b) and (c), the respective isoniazid derivative is presented in green, 1nta in blue, glide planes as magenta lines and inversion centres as orange spheres. (d) The overlap of izbt–1nta and izbt–2c4n (molecules in green), showing that the structures are not isostructural. |