Patent ID: 7141631

Claim:
A non-conjugated cyclic diene selected from the group consisting of bicyclo[2.2.1]hept-2-ene derivatives having an alkylidene group and bicyclo[2.2.1]hept-2-ene derivatives having an alkenyl group characterized in that it satisfies at least one of the following (1) and (2): (1) it contains a compound (A) having a seven-membered cyclic triene hydrocarbon structure in such an amount that the ratio (Wa/Wb) of the weight (Wa) of the compound (A) to the weight (Wd) of a non-conjugated cyclic diene is 0 or more and 5×10 −6 or less; and (2) it contains a conjugated polyene compound (B) having an eight-membered bicyclic hydrocarbon structure in such an amount that the ratio (Wb/Wd) of the weight (Wb) of the compound (B) to the weight (Wd) of a non-conjugated cyclic diene is 0 or more and 30×10 −6 or less.