π–π Stacking in bis­(quinolinium) tetra­chloro­zincate dihydrate

The asymmetric unit of the title compound, (C₉H₈N)₂[ZnCl₄]·2H₂O, consists of one quinolinium cation, one-half of the [ZnCl₄]²⁻ anion and one water mol­ecule. The geometry around the Zn atom is approximately tetra­hedral, with the Zn atom lying on a twofold axis. The water mol­ecules hydrogen bond to the [ZnCl₄]²⁻ anions and the quinolinium cations, forming a two-dimensional network with the cations protruding on both sides of the network and stacking through π–π inter­actions with adjacent networks.

mer-Bis(2,3-dimeth­yl-5-oxo-1-phen­yl-2,5-dihydro-1H-pyrazole-4-carbaldehyde 4,4-dimethyl­thio­semicarbazonato-κ³S,N,O)cobalt(III) tetra­fluoro­borate

In the title compound, [Co(C₁₅H₁₈N₅OS)₂]BF₄, the cation has a distorted octa­hedral geometry around the Co^III atom, with two 2,3-dimeth­yl-5-oxo-1-phen­yl-2,5-dihydro-1H-pyrazole-4-carbaldehyde 4,4-dimethyl­thio­semicarbazonate anions coord­inated as meridional tridentate ligands through the thiol­ate S, the antipyrine O and the imine N atoms. A tetra­fluoro­borate anion balances the charge of the Co^III complex.