Abstract
The solid-state behavior of hydroquinone 1 with tris(N,N-diethyl)trimesamide 2 and tris(N,N-dimethyl)trimesamide 3 has been determined using phase diagrams and X-ray diffraction techniques. A 3:2 complex, 4, forms between
1 and the diethyl derivative 2, while a 2:1 complex, 5, forms between 1 and the dimethyl derivative 3. X-ray structure
determinations of the cocrystals reveal that the structures both contain a persistent
(30) hydrogen bond ring system.
The packing of the ring depends on the differing steric requirements of the methyl and ethyl substituents on trimesamides
2 and 3.