Acta Cryst. (2012). C68, m246-m250 [ doi:10.1107/S0108270112031885 ]
Abstract: In order to explore the potential propensity of the 1,1'-methylenedipyridinium dication to form organic-inorganic hybrid ionic compounds by reaction with the appropriate halide metal salt, the organic-inorganic hybrid salts 1,1'-methylenedipyridinium tetrachloridocuprate(II), (C11H12N2)[CuCl4], (I), and 1,1'-methylenedipyridinium bis[tetrachloridoaurate(III)], (C11H12N2)[AuCl4]2, (II), were obtained by treatment of 1,1'-methylenedipyridinium dichloride with CuCl2 and Na[AuCl4], respectively. Both hybrid salts were isolated as pure compounds, fully characterized by multinuclear NMR spectroscopy and their molecular structures confirmed by powder X-ray diffraction studies. The crystal structures consist of discrete 1,1'-methylenedipyridinium dications and [CuCl4]2- and [AuCl4]- anions for (I) and (II), respectively. As expected, the dications form a butterfly shape; the CuII centre of [CuCl4]2- has a distorted tetrahedral configuration and the AuIII centre of [AuCl4]- shows a square-planar coordination. The ionic species of (I) and the dication of (II) each have twofold axial symmetry, while the two [AuCl4]- anions are located on a mirror-plane site. Both crystal structures are stabilized by intermolecular C-H
Cl hydrogen bonds and also by Cl![[pi]](/logos/entities/pi_rmgif.gif)
interactions. It is noteworthy that, while the average intermolecular centroid-centroid pyridinium ring distance in (I) is 3.643 (8) Å, giving strong evidence for noncovalent - ring interactions, for (II), the shortest centroid-centroid distance between pyridinium rings of 5.502 (9) Å is too long for any significant - ring interactions, which might be due to the bulk of the two [AuCl4]- anions.
Formula: (C11H12N2)[CuCl4] and (C11H12N2)[AuCl4]2
 |    Rietveld powder data file (CIF format) (237.7 kbytes) |
| Rietveld powder data file (CIF format) (251.7 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