Abstract
The asymmetric unit of the 5:3 title co-crystal of 2-amino-4-phenyl-5,6-dihydrobenzo[h]quinoline-3-carbonitrile and 3-amino-1-phenyl-9,10-dihydrophenanthrene-2,4-dicarbonitrile, 0.625C(20)H(15)N(3 center dot)0.375C(22)H(15)N(3), has the atoms of the fused-ring system and those of the amino, cyano and phenyl substitutents overlapped. The fused-ring system is buckled owing to the ethylene linkage in the central ring, the two flanking aromatic rings being twisted by 20.1 (1)degrees. This ethylene portion is disordered over two positions in a 1:1 ratio. The phenyl ring is twisted by 69.5 (1)degrees relative to the amino- and cyano-bearing aromatic ring. In the crystal, two molecules are linked by an N-H center dot center dot center dot N hydrogen bond, generating a a helical chain along [010].