Nomenclature of Alkenes and Cycloalkenes

STRATEGY AND ANSWER First we write a bicydo[2.2.1]heptane ring and number it. Then we add the substituents (two chlorine atoms) to the proper carbon. 

Give names for each of the following bicyclic alkanes  

Many older names for alkenes are still in common use. Propene is often called propylene, and 2-methylpropene frequently bears the name isobutylene  

The lUPAC rules for naming alkenes are similar in many respects to those for naming alkanes  

Determine the parent name by selecting the longest chain that contains the double bond and change the ending of the name of the alkane of identical length from -ane to -ene. Thus, if the longest chain contains five carbon atoms, the parent name for the alkene is pentene if it contains six carbon atoms, the parent name is hexene, and so on. 

---