μ₂-Aqua-bis­(μ₂-trifluoro­aceto-κ²O,O′)bis­[bis­(pyridine-κN)(trifluoro­acetato-κO)cobalt(II)]

The title complex, [Co₂(C₂F₃O₂)₄(C₅H₅N)₄(H₂O)], crystallizes as a neutral dinuclear mol­ecule with two crystallographically distinct octa­hedrally coordinated Co^II ions in the asymmetric unit. The metal ions are connected by two μ₂-bridging trifluoro­acetate ions and a single μ₂-bridging water mol­ecule. Each cobalt(II) coordination sphere is completed by a further trifluoroacetate ion, which coordinates in a monodentate manner, and also by two pyridine mol­ecules, resulting in local cis-CoN₂O₄ coordination. The water mol­ecule H atoms participate in intra­molecular O—H...O hydrogen bonds to the pendant O atoms of the monodentate trifluoro­acetate ligands.

A synchrotron study of mercury(I) acetate

Mercury(I) actetate, [Hg(C₂H₃O₂)]_n, crystallizes as centrosymmetric dimers, CH₃COO-Hg-Hg-OOCCH₃, with an Hg-Hg distance of 2.5202 (15) Å and an Hg-O distance of 2.152 (12) Å. The dimers are assembled into infinite ribbons by long, weaker Hg-O bonds [Hg-O = 2.6802 (12) Å]. There are no strong inter­molecular forces between the ribbons.