Low-temperature superstructure of [(N,N-diisobutylcarbamoyl)methyl]octyl(phenyl)phosphine oxide (CMPO)

At 120 K, the title compound, C24H42NO2P, crystallizes in a unit cell with a doubled a parameter compared with the room-temperature structure. There are four molecules in the asymmetric unit, one of which shows extensive disorder in a 0.588 (3):0.412 (3) ratio. In the crystal, numerous C—H...O interactions link the molecules.