Abstract
The crystal structure of a 1 : 1 complex of aminopyrine and cyclobarbital was determined from X-ray diffraction data. The triclinic unit cell dimensions are a=12.877, b=14.357, c=7.199A, α=91.49°, β=104.42°, and γ=100.05°. The space group is P1 ; Z=2. The intensity data were collected on a single crystal diffractometer and the structure was solved directly by the symbolic addition procedure. Molecules in the crystals were arranged in the series of aminopyrine-cyclobarbital-cyclobarbital-aminopyrine linked by hydrogen bonds. A partially disordered structure was observed of the cyclobarbital molecule.
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