Acta Cryst. (2004). B60, 512-519 [ doi:10.1107/S0108768104016064 ]
Cl-M hydrogen bonds while M-ClX-C halogen bonds remain intact in dihydrates of halopyridinium hexachloroplatinatesAbstract: The crystal structures of the 3-halopyridinium hexachloroplatinate(IV) dihydrates (HPyX-3)2[PtCl6]·2H2O [(1), X = Br; (2a), (2b), X = I] comprise networks in which the molecular components are linked via N-HO and O-HCl-Pt hydrogen bonds and Pt-ClX-C halogen bonds (X = Br, I). The iodo derivative has been isolated in two polymorphic forms. Of particular interest to the understanding of the utility of the hydrogen bonds and M-XX'-C halogen bonds that propagate the networks in anhydrous salts of this type is that the water molecules insert exclusively into the putative N-HCl-Pt hydrogen bonds, while the Pt-ClX'-C halogen bonds remain undisrupted by the presence of water molecules.
Keywords: hydrogen bonds; halogen bonds; polymorphs; halopyridinium hexachloroplatinates.
 |   Structure factor file (CIF format) (116.2 kbytes) |
| Structure factor file (CIF format) (120.2 kbytes) |
| Structure factor file (CIF format) (226.0 kbytes) |
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