Reversible CO2 fixation by intramolecularly coordinated diorganotin(IV) oxides

The intramolecularly coordinated organotin(IV) oxides [L(Ph)Sn(μ-O)]2 (1) and [L(Bu)Sn(μ-O)]2 (2) readily absorb CO2 yielding molecular organotin(IV) carbonates L(Ph)SnCO3 (3) and L(Bu)SnCO3 (4) with terminally bonded the carbonate moiety. The easy desorption and reversible CO2 fixation was achieved.