Bis(formato-κO)bis­[1-(pyridin-2-yl)ethanone oxime-κ²N,N′]nickel(II)

In the title compound, [Ni(HCOO)₂(C₇H₈N₂O)₂], the Ni atom is six-coordinated by four N atoms from two oxime ligands and by two O atoms from two formate ions in a distorted octa­hedral geometry, with the oxime-N atoms mutually trans. The mol­ecular conformation is stabilized by intra­molecular O—H...O hydrogen bonds.

Bis(μ-ferrocene­carboxyl­ato)bis­[aqua­­bis(ferrocene­carboxyl­ato)methano­l­erbium(III)] methanol disolvate

In the centrosymmetric title coordination compound, [Er₂{Fe(C₅H₅)(C₆H₄O₂)}₆(CH₃OH)₂(H₂O)₂]·2CH₃OH, the two Er^III ions are bridged by two ferrocene­carboxyl­ate anions as asymmetrically bridging ligands, leading to dimeric cores. The Er^III ion has a distorted dodeca­hedral coordination with six coordinating O atoms derived from the ferrocene­carboxyl­ate ligands and two coordinated O atoms from one water mol­ecule and one methanol mol­ecule. The asymmetric unit comprises a half of the complex mol­ecule and a methanol solvent mol­ecule. Intra­molecular O—H...O and C—H...O inter­actions occur. In the crystal, mol­ecules are linked by inter­molecular O—H...O hydrogen bonds and C—H...O as well as C—H...π inter­actions.