Synthesis of a potassium capped terminal cobalt–oxido complex

An unusual example of a potassium capped terminal cobalt–oxido complex has been isolated and crystallographically characterized. The synthesis of [^tBu,TolDHP]CoOK proceeds from a previously reported parent compound, [^tBu,TolDHP]CoOH, via deprotonation with KO^tBu. Structural and electronic characterization suggest a weakly coupled dimer in a distinct seesaw geometry with a Co(III) oxidation state and a non-innocent radical ligand.