Chlorido{4-ethyl-1-[1-(pyrazin-2-yl)ethyl­idene]thio­semicabazidato-κS}bis­(triphenyl­phosphane-κP)silver(I)

The title compound, [Ag(C₉H₁₃N₅S)Cl(C₁₈H₁₅P)₂], crystallizes with four independent mol­ecules in the asymmetric unit, in each of which the Ag atom is in a distorted tetra­hedral coordination, defined by the chloride ligand, the S atom of the neutral ligand and two P atoms derived from the triphenyl phosphine ligands. The thio­semicarbazone acts as a monodentate ligand through its thione S atom. An intra­molecular N—H...Cl hydrogen bond occurs in two of the independent mol­ecules. In the crystal, the mol­ecules are assembled through N—H...Cl hydrogen bonds, forming chains along [101].

Iodido{4-phenyl-1-[1-(1,3-thia­zol-2-yl-κN)ethyl­idene]thio­semicarbazidato-κ²N′,S}{4-phenyl-1-[1-(1,3-thia­zol-2-yl)ethyl­idene]thio­semicarbazide-κS}cadmium(II)

In the title complex, [Cd(C₁₂H₁₁N₄S₂)I(C₁₂H₁₂N₄S₂)], the Cd^II ion is penta­coordinated by two thio­semicarbazone ligands (one neutral and the other anionic) and one iodide ion in a distorted square pyramidal (τ = 0.35) geometry. The central ion is coordinated by the thia­zole N atom, the thio­ureido N and the S atom of the deprotonated thio­semicarbazone ligand. The other ligand is linked with the central ion through the C=S group. The deprotonated ligand intra­molecularly hydrogen bonds to the thia­zole ring N atom, while the ligand forms an inter­molecular hydrogen bond to the thiol­ate S atom of the second ligand. The deprotonation of the tridentate ligand and its coordination to the Cd^II ion via the S atom strikingly affects the C—S bond lengths. The C—S bond lengths in the neutral and deprotonated ligands in the metal complex are 1.709 (3) and 1.748 (2) Å, respectively, whereas it is 1.671 (3) Å in the free ligand. In the metal complex, the Cd—S distances are 2.6449 (6) and 2.5510 (6) Å. The Cd—I bond length is 2.7860 (2) Å.

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).