P. G. Aravindan

5′′‐Benzyl­idene‐1′,1′′‐dimethyl‐4′‐phenylacenapthene‐2‐spiro‐2′‐pyrrolidine‐3′‐spiro‐3′′‐piperidine‐1,4′′‐dione

In the title compound, C34H30N2O2, the pyrrolidine and piperidinone rings each adopt a half-chair conformation. The dihedral angle between the two phenyl-ring substituents is 70.4 (1)°. Intramolecular C—H⋯O hydrogen bonds are observed in the crystal structure. In addition to these interactions, C—H⋯π interactions also play a role in stabilizing the crystal structure.

Supramolecular structures of 2-cyano-3-dimethylamino-N-(4-methylphenyl)acrylamide and 2-cyano-3-dimethylamino-N-(2-methoxyphenyl)acrylamide

In the title compounds, C(13)H(15)N(3)O, (I), and C(13)H(15)N(3)O(2), (II), the dihedral angles between the planes of the phenyl ring and the amide group are 4.1 (1) and 20.7 (1) degrees, respectively. The molecules adopt a fully extended conformation, aided by intramolecular interactions. The molecular structures of (I) and (II) display different crystal packing and hydrogen-bonding networks.