Results Thermal Exchange of Olefins in CpCo (dinitrosoa1kane) Complexes. Heating compound 1 with norbornene (2a) or substituted norbornene4 2b at temperatures between 45 and 85 OC in benzene-d, or toluene-d8 converted it quantitatively into 3a, b (eq 2) and 2, 3-dimethyl-2-butene.