Acta Cryst. (2005). B61, 46-57 [ doi:10.1107/S0108768104028605 ]
Abstract: The crystal structures of eight new co-crystals of quinol with pyrazine, piperazine, morpholine, pyridine, piperidine, 4,4'-bipyridine, N-methylmorpholine and N,N'-dimethylpiperazine are reported. Quinol forms 1:1 co-crystals with pyrazine, piperazine and N,N'-dimethylpiperazine, but 1:2 co-crystals with morpholine, 4,4'-bipyridine, N-methylmorpholine, pyridine and piperidine. This difference can be rationalized in most cases by the presence of, respectively, two or one strong hydrogen-bond acceptor(s) in the guest molecule. The exception to this generalization is 4,4'-bipyridine, which forms a 1:2 co-crystal, possibly to optimize crystal packing. All structures are dominated by hydrogen bonding between quinol and the guest molecules. A doubly bridging motif, which connects pairs of quinol and guest molecules via NH
O or CHO interactions, is present in all but the sterically hindered N,N'-dimethylpiperazine and N-methylmorpholine co-crystals.
Keywords: quinol; hydrogen bonding.
 |   Structure factor file (CIF format) (57.6 kbytes) |
| Structure factor file (CIF format) (60.2 kbytes) |
| Structure factor file (CIF format) (87.0 kbytes) |
| Structure factor file (CIF format) (85.5 kbytes) |
| Structure factor file (CIF format) (95.2 kbytes) |
| Structure factor file (CIF format) (121.7 kbytes) |
| Structure factor file (CIF format) (99.0 kbytes) |
| Structure factor file (CIF format) (291.8 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