Name this by the IUPAC system
And this one:
If you draw the first one in a linear arrangement, it will be easier to name:
Step 1: How many carbons in a linear arrangement? 7
Therefore, it's a "hept"
Step 2: How many double bonds? 1
Therefore, it's a "heptene"
Step 3: Where is the double bond? at ...
Naming an IUPAC system