Nickela-2-oxazolidinones, formed by oxidative coupling of imines and CO 2 with Ni 0 , react with LiCl under mild conditions (4 °C, 1 atm) to afford vicinal diamines in up to 89% yield. The reaction is the first organometallic example of reductive imine coupling requiring CO 2 . In this system, CO 2 is participatory and is not incorporated in the reaction products. These results represent an important addition to our understanding of the reactivity of metallacycles derived from CO 2 and unsaturated compounds.