Reductive deoxygenation of CO2 by a bimetallic titanium bis(pentalene) complex

The bimetallic bis(pentalene) complex (µ:?5,?5-Pn†)2Ti2 reductively splits CO2 to form a bis(oxo) bridged dimer [(?8-Pn†)Ti(µ-O)]2, in which the Ti–Ti bond has been cleaved, and the dicarbonyl complex (µ:?5,?5-Pn†)2[Ti(CO)]2.