The crystal structure of iprodione has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional theory techniques. Iprodione crystallizes in the space group P21/c (#14) with a = 15.6469(3), b = 22.8436(3), c = 8.67226(10) Å, β = 94.1303(7)°, V = 3,091.70(9) Å3, and Z = 8 at 298 K. The crystal structure contains clusters of four iprodione molecules. The only two classical N–H···O hydrogen bonds in the structure are both intramolecular. The powder pattern has been submitted to the International Centre for Diffraction Data for inclusion in the Powder Diffraction File™ (PDF®).
