Crystal structure of tetra­kis­[μ(2)-2-(di­methyl­amino)­ethano­lato-κ(3) N,O:O]di-μ(3)-hydroxido-di­thio­cyanato-κ(2) N-dichromium(III)dilead(II) di­thio­cyanate aceto­nitrile monosolvate

The tetra­nuclear complex cation of the title compound, [Cr(2)Pb(2)(NCS)(2)(OH)(2)(C(4)H(10)NO)(4)](SCN)(2)·CH(3)CN, lies on an inversion centre. The main structural feature of the cation is a distorted seco-norcubane Pb(2)Cr(2)O(6) cage with a central four-membered Cr(2)O(2) ring. The Cr(III) ion is coordinated in a distorted octa­hedron, which involves two N atoms of one bidentate ligand and one thio­cyanate anion, two μ(2)-O atoms of 2-(di­methyl­amino)­ethano­late ligands and two μ(3)-O atoms of hydroxide ions. The coordination geometry of the Pb(II) ion is a distorted disphenoid, which involves one N atom, two μ(2)-O atoms and one μ(3)-O atom. In addition, weak Pb⋯S inter­actions involving the coordinating and non-coordinating thio­cyanate anions are observed. In the crystal, the complex cations are linked through the thio­cyanate anions via the Pb⋯S inter­actions and O—H⋯N hydrogen bonds into chains along the c axis. The chains are further linked together via S⋯S contacts. The contribution of the disordered solvent aceto­nitrile mol­ecule was removed with the SQUEEZE [Spek (2015 ▸). Acta Cryst. C71, 9–18] procedure in PLATON. The solvent is included in the reported mol­ecular formula, weight and density.