Fig. 7: Computed reaction profile for the disproportionation of 2Cs to 4Cs/1/Cs+(C6H6)−•.
From: Evidence for ligand- and solvent-induced disproportionation of uranium(IV)
Complex 2Cs containing two uranium(IV) ions reacts via transition state Cs-TS-dis to give the disproportionation intermediate Cs-product-dis where uranium(V) and (III) ions are formed. Spontaneous cleavage of Cs-product-dis to two monomer units is clearly disfavoured, as is reaction with toluene to give 4Cs, 1, and the caesium toluene radical anion salt. Cs-product-dis however does react with benzene to give 4Cs, 1, and the caesium benzene radical anion salt. Complex 4Cs is then converted to 5Cs using the capping agent Me6-Tren.
