Acta Cryst. (2013). E69, o217 [ doi:10.1107/S1600536813000305 ]
Abstract: In the crystal structure of the title compound, C21H24F2N2O2, there are two intramolecular O-H
N hydrogen bonds involving the N atoms of the imidazolidine ring and the hydroxy groups. The crystal studied was a meso compound obtained by the reaction of the aminal (2S,7R,11S,16R)-1,8,10,17-tetraazapentacyclo[8.8.1.18,17.02,7.011,16]cosane with 4-fluorophenol. The imidazolidine ring has a twisted conformation with a CH-CH-N-CH2 torsion angle of 44.99 (14)° and, surprisingly, the lone pairs of the N atoms are disposed in a syn isomerism, making the title compound an exception to the typical `rabbit-ear effect' in 1,2-diamines. In the crystal, molecules are linked via C-HF hydrogen bonds, forming chains along the c-axis direction. These chains are linked via another C-HF hydrogen bond, forming a three-dimensional network.
 |   Hyper-Text Markup Language (HTML) file |
 | Chemical Markup Language (CML) file (7.8 kbytes) |
To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.
The download button will force most browsers to prompt for a file name to store the data on your hard disk.
Where possible, images are represented by thumbnails.
Copyright © International Union of Crystallography
IUCr Webmaster