title: 4,4'-Difluoro-2,2'-{[(3aRS,7aRS)-2,3,3a,4,5,6,7,7a-octa-hydro-1H-1,3-benzimidazole-1,3-di-yl]bis-(methyl-ene)]}diphenol.
abstract: In the crystal structure of the title compound, C(21)H(24)F(2)N(2)O(2), the two N atoms of the imidazolidine moiety are linked to the hy-droxy groups by intra-molecular O-H⋯N hydrogen-bonding inter-actions. The crystal studied was a racemic mixture of RR and SS enatiomers. The cyclo-hexane ring adopts a chair conformation and the imidazolidine group to which it is fused has a twisted envelope conformation.
authors.forename: Augusto
authors.initials: A
authors.lastname: Rivera
authors.forename: Diego
authors.initials: D
authors.lastname: Quiroga
authors.forename: Jaime
authors.initials: J
authors.lastname: Ríos-Motta
authors.forename: Michal
authors.initials: M
authors.lastname: Dušek
authors.forename: Karla
authors.initials: K
authors.lastname: Fejfarová