JAMB - Chemistry (2008 - No. 39)
The IUPAC nomenclature for the structure above is
2, 3 - dichloro - 4, 4, 5 - trimethyl pent - 2 - ene
4, 5 - dichloro - 2, 3 - dimethyl hex - 2 - ene
2, 3 - dichloro - 4, 4 - dimethyl hex - 2- ene
2, 3 dichloro - 2, 2 - dimethyl hex - 2 - ene
Explication
The longest carbon chain in the compound is the hex-2-ene.
Counting all the attachments, the IUPAC nomenclature of the compound is 2,3 - dichloro-4,4- dimethyl hex-2-ene.