cyclo-Tetra­kis(μ₂-D-penicillaminato-κ⁴N,S:O,S)tetra­palladium(II) 9.75-hydrate

The asymmetric unit of the title compound, [Pd₄(C₅H₉NO₂S)₄]·9.75H₂O, contains two neutral tetranuclear complex molecules with similar conformations and 19.5 solvent water mol­ecules. Of the 21 independent water molecules, three exhibit an occupancy of one-half. In each tetranuclear complex molecule, the four Pd^II atoms have a square-planar coordination environment and are spanned by four D-penicillaminate ligands in a κ⁴N,S:S,O coordination mode, forming an eight-membered Pd₄S₄ metallacycle. In the crystal, two tetra­nuclear mol­ecules are connected to each other through eight N—H...O hydrogen bonds between amine and carboxyl­ate groups, constructing a cylindrical dimer. The dimers are further hydrogen-bonded with the solvent water mol­ecules, completing a three-dimensional network.

Bis[μ-1,3-bis­(di­phenyl­phosphan­yl)propane-κ²P:P′]digold(I) tetra­chloridonickelate(II) diethyl ether monosolvate

The title compound, [Au₂(C₂₇H₂₆P₂)₂][NiCl₄]·C₄H₁₀O, consists of a digold(I) complex cation, an [NiCl₄]²⁻ complex anion and a diethyl ether solvent mol­ecule. Two 1,3-bis­(di­phenyl­phosphan­yl)propane (dppp) ligands bridge two Au^I atoms, forming a metallacycle in which each of the Au^I atoms is coordinated in a slightly distorted linear environment by two P atoms. In the complex anion, the Ni^II atom is coordinated by four chloride ligands in a distorted tetra­hedral geometry. The complex cation and the complex anion form a cation–anion pair through two Au...Cl contacts of 3.040 (1) and 3.021 (2) Å. One of the phenyl groups of the dppp ligand is disordered over two positions with equal occupancies.