Crystal structure of 1-ethylspiro[imidazolidine-4,1′-indane]-2,5-dione

Abstract

In the title compound, C13H14N2O2, the C5 ring has an envelope conformation with the C atom adjacent to the quaternary C being the flap. The five atoms comprising the imidazolidine-2,4-dione ring are almost planar (r.m.s. deviation = 0.004 Å). The dihedral angle between the five-membered rings is 89.66 (10)°. In the crystal, inversion-related molecules are connected via {...HNCO}2 synthons. These are linked into a helical supramolecular chain along [010] by C—H...O interactions.

Keywords

• crystal structure
• spiro compounds
• hydantoin derivatives
• {...HNCO}2 synthons
• helical supramolecular chain
• C—H...O interactions