Largest Mixed Transition Metal/Actinide Cluster: A Bimetallic Mn/Th Complex with a [Mn₁₀Th₆O₂₂(OH)₂]¹⁸⁺ Core

A high-nuclearity mixed transition metal/actinide complex has been prepared from the reaction of a MnIII4 complex with Th(NO3)4 in MeCN/MeOH. The complex [Th6Mn10O22(OH)2(O2CPh)16(NO3)2(H2O)8] is the largest such complex to date and the first Th/Mn species. It is rich in oxide groups, which stabilize all of the metals in the high ThIV and MnIV oxidation levels. Magnetic characterization establishes that the complex has an S = 3 ground-state spin value.