Poly[tris­(dimethyl­formamide)(μ₃-2,4,6-triiodobenzene-1,3,5-tricarboxyl­ato)samarium(III)]

In the title compound, [Sm(C₉I₃O₆)(C₃H₇NO)₃]_n, the Sm^III atom is coordinated by nine O atoms, viz. six carboxyl­ate O atoms from three 2,4,6-triiodobenzene-1,3,5-tricarboxyl­ate (I₃BTC) ligands and three O atoms from three N,N-dimethyl­formamide (DMF) mol­ecules. Each I₃BTC ligand bridges three Sm^III atoms, generating a three-dimensional metal-organic framework structure. The asymmetric unit contains one Sm^III ion and one I₃BTC anion, both situated on a threefold axis, and one DMF mol­ecule in a general position.

[μ-3-(Methyl­sulfan­yl)benzene-1,2-di­thiol­ato-1:2κ⁴S,S′:S,S′]bis­[tri­carbonyl­iron(I)]

The title compound, [Fe₂(C₇H₆S₃)(CO)₆], was prepared as a biomimic for the active site of [FeFe]-hydrogenases. The central Fe₂S₂ core is in a butterfly conformation and each Fe^I atom has a pseudo-square-pyramidal coordination by three O atoms and two S atoms. The Fe—Fe distance is 2.471 (2) Å and the dihedral angle between the two Fe—S—Fe planes is 78.96 (7)°. The least-squares plane through the –S(C₇H₆S)S– bridge nearly bis­ects the mol­ecular structure: except for the two Fe(CO)₃ units, all atoms are in this plane with an average deviation from the plane of 0.028 (3) Å. In the crystal, the mol­ecules are linked into chains along [001] by C—H...π(arene) inter­actions.

Di-μ-cyanido-tetra­cyanido(5,5,7,12,12,14-hexa­methyl-1,4,8,11-tetra­aza­cyclo­tetra­decane)[N-(quinolin-8-yl)quinoline-2-carboxamidato]diiron(III)nickel(II) 2.07-hydrate

The asymmetric unit of the title complex, [Fe₂Ni(C₁₉H₁₂N₃O)₂(CN)₆(C₁₆H₃₆N₄)]·2.07H₂O, contains one [Fe(qcq)(CN)₃]⁻ anion, half a [Ni(teta)]²⁺ cation and two partially occupied inter­stitial water mol­ecules [qcq⁻ is the N-(quinolin-8-yl)quinoline-2-carboxamidate anion and teta is 5,5,7,12,12,14-hexa­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne]. In the complex mol­ecule, two [Fe(qcq)(CN)₃]⁻ anions additionally coordinate the central [Ni(teta)]²⁺ cation through cyanide groups in a trans mode, resulting in a trinuclear structure with the Ni²⁺ cation lying on an inversion centre. The two inter­stitial water mol­ecules are partially occupied, with occupancy factors of 0.528 (10) and 0.506 (9). O—H...O and O—H...N hydrogen bonding involving the two lattice water molecules and the carbonyl function and a teta N atom in an adjacent cluster leads to the formation of layers extending parallel to (010).