%0 Journal Article %T 4,4′-Difluoro-2,2′-[imidazolidine-1,3-diylbis(methylene)]diphenol %A Augusto Rivera %A Luz Stella Nerio %A Jaime Rí %A os-Motta %A Monika Kuč %A erá %A ková %J Acta Crystallographica Section E %D 2012 %I International Union of Crystallography %R 10.1107/s1600536812040329 %X In the title compound, C17H18F2N2O2, the imidazolidine ring system exists in a twist conformation. The mean plane through this ring system forms dihedral angles of 80.8 (8)¡ã and 66.2 (13)¡ã, with the benzene rings. The dihedral angle between the benzene rings is 52.0 (14)¡ã. Two intramolecular O¡ªH...N hydrogen bonds each generate S(6) ring motifs. In the crystal, weak C¡ªH...O hydrogen bonds form dimers, which are connected by further C¡ªH...O interactions. %U http://scripts.iucr.org/cgi-bin/paper?S1600536812040329