Crystal structure of a mixed-valence μ-oxide Sn₁₂ cluster

The mixed-valence μ-oxide Sn₁₂ cluster, deca­carbonyl­tetra-μ₄-oxido-hexa-μ₃-oxido-tetra­kis­[μ-2,2′-(pyridine-2,6-di­yl)bis(1,1-di­phenyl­ethano­lato)]deca­tin(II)ditin(IV)dimolyb­denum(O)(2 Mo—Sn) toluene hepta­solvate, [Mo₂Sn₁₂(C₃₃H₂₇NO₂)₄O₁₀(CO)₁₀]·7C₇H₈, has a crystallographically imposed inversion centre. The asymmetric unit also contains three and a half toluene solvent mol­ecules, one of which is disordered about a centre of symmetry. The complex mol­ecule comprises six distinct Sn atom species with four different coordination numbers, namely 3, 4, 5, and 6. The Sn^II atoms forming the central Sn₁₀O₁₀ core adopt distorted trigonal–pyramidal, square-pyramidal and octa­hedral coordination geometries provided by the μ-oxide atoms and by the O- and N-donor atoms of two pyridinedi­ethano­late ligands. The terminal Sn^IV atoms have distorted trigonal–bipyramidal coordination geometries, with a μ₄-oxide atom and the N atom of a pyridinedi­ethano­late ligand occupying the axial positions, and the Mo atom of a Mo(CO)₅ group and the alk­oxy O atoms of a ligand forming the equatorial plane. In the crystal, weak intra- and inter­molecular C—H...O hydrogen bonds are observed.