Answer
The major products are shown in the picture. The products are cyclohexene and ethylene.
Work Step by Step
The metal-alkylidene catalyst forms an intermediate four-membered ring with an alkene. Then the ring breaks apart, either to give the starting alkene and catalyst or to give a new alkene that has traded one alkylidene group with the catalyst. This mechanism allows the alkylidene groups to change partners back and forth with the catalytic metal until a thermodynamic equilibrium is reached. As we saw earlier, good yields of products result if there is an effective driving force (such as formation of a gaseous by-product or release of ring strain) to push the equilibrium toward the desired products.
