Name the compound ch3ch *double bond* c(ch3)ch(ch3)2. 1. 2,3-dimethyl-2-hexene 2. 3,4-dimethyl-2-pentene 3. 3,4,4-trimethyl-2-butene 4. 2,3-dimethyl-3-pentene 5. 3,5-dimethyl-2-hexene 6. 1,2,3-trimethyl-1-butene

CH3CH=C(CH3)CH(CH3)2

Start the carbon count at the end closest to the most important element, the double bond. I would recommend drawing the skeletal structure too so you can see where carbons are attached and how long the chain is.

3,4- dimethyl-2-pentene