Hexa-μ-acetato-1:2κ⁴O,O′;1:2κ²O:O;2:3κ⁴O,O′;2:3κ²O:O-bis­(4,4′-dimethyl-2,2′-bi­pyridine)-1κ²N,N′;3κ²N,N′-2-calcium-1,3-dizinc

In the centrosymmetric trinuclear Zn^II...Ca^II...Zn^II title complex, [CaZn₂(CH₃COO)₆(C₁₂H₁₂N₂)₂], the Ca^II ion lies on an inversion centre and is octa­hedrally coordinated by six acetate O atoms. The Zn^II ion is coordinated by two N atoms from a bidentate di­methyl­bipyridine ligand and three O atoms from acetate ligands bridging to the Ca^II ion, leading to a distorted square-pyramidal coordination sphere. The Zn...Ca distance is 3.4668 (5) Å.

N¹-(Thio­phen-2-ylmeth­yl)-N³,N³-bis­[3-(thio­phen-2-yl­methyl­ammonio)­prop­yl]propane-1,3-di­ammonium hexa­fluorido­silicate methanol tris­olvate

In the title compound, C₂₄H₄₀N₄S₃⁴⁺·2SiF₆²⁻·3CH₃OH, the central tertiary amine function is protonated and is connected to three thio­phen-2-yl­methyl­amino-n-propyl groups, forming the arms of a T-shaped cation that has two pockets. Each arm contains one protonated secondary amine function, and each pocket is occupied by one SiF₆²⁻ anion bonded via two N—H...F inter­actions with the protonated amine group on the middle arm, while two methanol solvent mol­ecules are N—H...O hydrogen-bonded with the other secondary protonated amine groups on the side arms. Weak O—H...O and O—H...F hydrogen bonds between the solvent mol­ecules and between the solvent mol­ecules and the anions, respectively, are also observed. All three thio­phene groups in the arms are disordered over two sets of sites, with occupancy ratios of 0.828 (3):0.172 (3), 0.910 (2):0.090 (2) and 0.890 (3):0.110 (3).