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In the title compound, (C7H11N2)3[Fe(NCS)6]·H2O, the FeIII cation is coordinated by six terminal N-bonded thio­cyanate anions into a discrete threefold negatively charged complex. Charge balance is achieved by three protonated 4-(dimethyl­amino)­pyridine cations. The asymmetric unit consists of one FeIII cation, six thio­cyanate anions, three 4-(dimethyl­amino)­pyridinium cations and one water mol­ecule, all of them located in general positions.

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In the title compound, (C10H10N2S)2[NiCl4]Cl2, the Ni2+ cation is tetra­hedrally coordinated by four chloride anions. Two 4,4′-sulfanediyldipyridinium cations and two non-coordinating chloride anions are connected via N—H...Cl hydrogen-bonding inter­actions into 20-membered rings, in the middle of which are situated the [NiCl4]2− complex anions. These rings are stacked in the b-axis direction. The Ni2+ cation is located on a twofold rotation axis, whereas the chloride anions and the 4,4′-sulfanediyldipyridinium cations occupy general positions.
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