A Two-Coordinate Manganese(0) Complex with an Unsupported Mn–Mg Bond: Allowing Access to Low Coordinate Homo- and Heterobimetallic Compounds HicksJamie HoyerChad E. MoubarakiBoujemaa ManniGiovanni Li CarterEmma MurphyDamien M. MurrayKeith S. GagliardiLaura JonesCameron 2016 This study details the synthesis and characterization of an unprecedented two-coordinate, high-spin manganese(0) complex that incorporates an unsupported Mn–Mg bond, viz. L<sup>†</sup>MnMg­(<sup>Mes</sup>Nacnac) (L<sup>†</sup> = −N­(Ar<sup>†</sup>)­(SiPr<sup><i>i</i></sup><sub>3</sub>), Ar<sup>†</sup> = C<sub>6</sub>H<sub>2</sub>{C­(H)­Ph<sub>2</sub>}<sub>2</sub>Pr<sup><i>i</i></sup>-2,6,4; <sup>Mes</sup>Nacnac = [(MesNCMe)<sub>2</sub>CH]<sup>−</sup>; Mes = mesityl). This compound has been utilized as an “inorganic Grignard reagent” in the preparation of the first two-coordinate manganese­(I) dimer, L<sup>†</sup>MnMnL* (L* = −N­(Ar*)­(SiMe<sub>3</sub>), Ar* = C<sub>6</sub>H<sub>2</sub>{C­(H)­Ph<sub>2</sub>}<sub>2</sub>Me-2,6,4), and the related mixed valence, bis­(amido)-hetereobimetallic complex, Mn<sup>II</sup>(μ-L<sup>†</sup>)­(μ-L*)­Cr<sup>0</sup>. It is also shown to act as a two-electron reducing agent in reactions with unsaturated substrates.