I've received a few mixed answers to this question. Some sources say when determining the parent chain for unsaturated hydrocarbons, the longest chain should be considered before the chain with the most multiple bonds, for example:
While others say what appears to be the opposite, such as this excerpt from Wikipedia:
The steps for naming an organic compound are:
Identification of the parent hydrocarbon chain. This chain must obey the following rules, in order of precedence:
- It should have the maximum number of substituents or branches cited as prefixes.
- It should have the maximum number of substituents of the suffix functional group. By suffix, it is meant that the parent functional group should have a suffix, unlike halogen substituents. If more than one functional group is present, the one with highest precedence should be used.
- It should have the maximum length.
- It should have the maximum number of multiple bonds.
- It should have the maximum number of single bonds.
Would be great if I were to receive clarification regarding this.