A novel catalytic route to 2-bicyclo[2.2.1]hept-2-ylidenebicyclo[2.2.1]-heptane involving CH bond activation of bicyclo[2.2.1]hept-2-ene

The tungsten(II) carbonyl compound has been found to be a very effective catalyst for dimerization reaction of bicyclo[2.2.1]hept-2-ene to 2-bicyclo[2.2.1]hept-2-ylidenebicyclo[2.2.1]-heptane conducted in dichloromethane solution at room temperature.