Diaquabis(4‐fluorobenzoato‐κO)bis(nicotinamide‐κN)cobalt(II)

The title compound, [Co(C₇H₄FO₂)₂(C₆H₆N₂O)₂(H₂O)₂], is a three‐dimensional hydrogen‐bonded supramolecular complex. The Co^II ion resides on a centre of symmetry and is in an octahedral coordination environment comprising two pyridyl N atoms, two carboxylate O atoms and two O atoms from water molecules. Intermolecular N—H...O and O—H...O hydrogen bonds produce R₃²(6), R₂²(12) and R₂²(16) rings, which lead to two‐dimensional chains. An extensive three‐dimensional network of C—H...F, N—H...O and O—H...O hydrogen bonds and π–π interactions are responsible for crystal stabilization.     

Tetrakis(μ‐triisopropylsilanethiolato)‐1:2κ4S:S;2:3κ4S:S‐bis(triisopropylsilanethiolato)‐1κS,3κS‐trizinc(II)

The title compound, [Zn₃(C₉H₂₁SiS)₆] or [(ⁱPr₃SiS)Zn(μ‐SSiⁱPr₃)₂Zn(μ‐SSiⁱPr₃)₂Zn(SSiⁱPr₃)], is the first structurally characterized homoleptic silanethiolate complex of zinc. A near‐linear arrangement of three Zn^II ions is observed, the metals at the ends being three‐coordinate with one terminally bound silanethiolate ligand. The central Zn^II ion is four‐coordinate and tetrahedral, with two bridging silanethiolate ligands joining it to each of the two peripheral Zn^II ions. The nonbonding intermetallic distances are 3.1344 (11) and 3.2288 (12) Å, while the Zn...Zn...Zn angle is 172.34 (2)°. A trimetallic silanethiolate species of this type has not been previously identified by X‐ray crystallography for any element.     

Tetra‐μ‐chloro‐1:2κ4Cl;1:3κ4Cl‐di­methyl‐2κC,3κC‐tetra­kis(tetra­hydro­furan)‐1κ2O,2κO,3κO‐chromium(II)dizinc(II)

The title compound, [CrZn₂(CH₃)₂Cl₄(C₄H₈O)₄], contains a central distorted octa­hedral Cr atom, located at an inversion center, bound to two tetra­hydro­furan ligands and four chloro ligands that bridge to two symmetry‐related tetra­hedral Zn atoms. The coordination around zinc is completed by methyl and tetra­hydro­furan ligands. This structure is compared with a previously reported complex of vanadium, and their differences in metric parameters are explained.     

Dichlorobis(pyridine‐κN)bis(3,3,3‐trifluoropropyl‐κC1)tin(IV)

In the title compound, [Sn(C₃H₄F₃)₂Cl₂(C₅H₅N)₂], the Sn atom lies on an inversion centre and is octahedrally coordinated by two Cl atoms, two tri­fluoro­propyl groups and two N atoms in an all‐trans configuration. The electronegative tri­fluoro­propyl groups increase the electrophilic properties of the Sn atom, and the Sn—Cl and Sn—N bonds are shortened in comparison with those reported for analogous compounds.