Question

select the correct name for the compound, including the correct (e) or (z) designation where appropriate. the compound is named: (e)-3,7-dimethyl-3-octene (e)-2,6-dimethyl-5-octene (z)-3,7-dimethyl-3-octene (z)-2,6-dimethyl-5-octene

Explanation:

1. Determine the parent chain:

• The parent chain is an octene (8 - carbon chain with a double bond).
• The double bond is between carbon 3 and 4.

1. Locate substituents:

• There are two methyl groups at positions 3 and 7.

1. Assign (E) or (Z) configuration:

• Using the Cahn - Ingold - Prelog (CIP) rules, for the double bond at C3 - C4:
• On C3, the higher - priority group (based on atomic number) is the methyl group (higher than the propyl group).
• On C4, the higher - priority group is the butyl group (higher than the hydrogen).
• The higher - priority groups are on opposite sides of the double bond, so it is (E) configuration.

Answer:

(E)-3,7-dimethyl-3-octene