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In the title salt, [Co(C7H9NO)2(H2O)2]Cl2, the CoII cation, located on an inversion center, is N,O-chelated by two hy­droxy­ethyl­pyridine ligands and coordinated by two water mol­ecules in a distorted O4N2 octa­hedral geometry. In the crystal, the Cl anions link with the complex cations via O—H...Cl hydrogen bonds, forming a three-dimensional supra­molecular architecture. π–π stacking is observed between the pyridine rings of adjacent mol­ecules [centroid–centroid distance = 3.5810 (11) Å].

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The crystal packing of the title salt, C6H11N2O+·I3, can be described as consisting of alternating layers of cations and anions parallel to the (100) plane along the a-axis direction. The components are linked by O—H...I, C—H...I and C—H...O interactions, generating a three-dimensional network. The O atom deviates from the imidazol ring by 0.896 (2) Å.
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