[Mn12O12(O2CMe)12(NO3)4(H2O)4]: facile synthesis of a new type of Mn12complex

Abstract

The title dodecanuclear Mn complex, namely dodeca-μ2-acetato-κ24O:O′-tetraaquatetra-μ2-nitrato-κ8O:O′-tetra-μ4-oxido-octa-μ3-oxido-tetramanganese(IV)octamanganese(III) nitromethane tetrasolvate, [Mn12(CH3COO)12(NO3)4O12(H2O)4]·4CH3NO2, was synthesized by the reaction of Mn2+and Ce4+sources in nitromethane with an excess of acetic acid. This compound is distinct from the previously known single-molecule magnet [Mn12O12(O2CMe)16(H2O)4], synthesized by Lis [Acta Cryst.(1980), B36, 2042–2044]. It is the first Mn12-type molecule containing nitrate ligands to be directly synthesized without the use of a preformed cluster. Additionally, this molecule is distinct from all other known Mn12complexes due to intermolecular hydrogen bonds between the nitrate and water ligands, which give rise to a three-dimensional network. The complex is compared to other known Mn12molecules in terms of its structural parameters and symmetry.