2-[1′-(Benz­yloxy)spiro­[indane-1,2′-pyrrolidine]-5′-yl]aceto­nitrile

In the title compound, C₂₁H₂₂N₂O, the planes of the two six-membered rings make a dihedral angle of 89.51 (7)°. The pyrrolidine ring has a puckering amplitude q₂ = 0.418 (3) and a pseudo-rotation phase angle φ₂ = −166.8 (5), adopting a twist conformation (T). The other five-membered ring has a puckering amplitude q₂ = 0.247 (2) and a pseudo-rotation phase angle φ₂ = −173.7 (5), adopting an envelope conformation with the CH₂ atom adjacent to the C atom common with the pyrrolidine ring as the flap. In the crystal, mol­ecules are linked via C—H...N, enclosing R²₂(20) rings, forming chains propagating along [100]. The aceto­nitrile group is disordered over two positions and was refined with a fixed occupancy ratio of 0.56:0.44.