Isomers of a Dibismuthane, R₂Bi−BiR₂ [R = 2,6-(Me₂NCH₂)₂C₆H₃], and Unusual Reactions with Oxygen:  Formation of [R₂Bi]₂(O₂) and R‘R‘ ‘Bi [R‘ = 2-(Me₂NCH₂)-6-{Me₂N(O)CH₂}C₆H₃; R‘ ‘ = 2-(Me₂NCH₂)-6-{O(O)C}C₆H₃]

R₂Bi−BiR₂ [1; R = 2,6-(Me₂NCH₂)₂C₆H₃], a dibismuthane that exists in different forms in the crystalline state, reacts in air with the formation of the peroxide [R₂Bi]₂(O₂) (2) and partial oxidation of the pendant (dimethylamino)methyl groups, yielding the mononuclear bismuth complex R‘R‘ ‘Bi (3) [R‘ = 2-(Me₂NCH₂)-6-{Me₂N(O)CH₂}C₆H₃; R‘ ‘ = 2-(Me₂NCH₂)-6-{O(O)C}C₆H₃].