rac-12a,11b-Diphenyl-1,2,3,4,5,11-hexahydro-2,3,4a,5a,10a,11a-hexaazabenz[ f]indeno[2,1,8- ija]naphth[2,3- f]azulene-1,4,10-trione chloroform solvate.

The title compound, C25H20N6O3·CHCl3, a rigid glycoluril derivative, is an intermediate for the synthesis of molecular tweezers. The crystal structure is stabilized by intermolecular C—H...O and N—H...O hydrogen bonds. The chloroform solvent molecule is disordered over two positions; the site occupancy factors are ca 0.89 and 0.11. [ABSTRACT FROM AUTHOR]