| Summary: | The asymmetric unit of the title compound, (C13H10N)2[PtCl6]·2H2O, contains a protonated acridine cation, one half of a [PtCl6]2− dianionic complex and a solvent water molecule. The octahedral [PtCl6]2− dianion is located on an inversion centre. π–π interactions between neighboring acridinium cations produce stacks along the a axis; the shortest distance between the centroids of the six-membered rings within the cations is 3.553 (9) Å. In the crystal, two independent intermolecular O—H...Cl hydrogen bonds, both involving the same Cl atom of the anion as acceptor, give rise to chains also running along the a axis; in addition each water molecule, as a hydrogen-bond acceptor, is linked to the acridinium N—H group.
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