name the compound CH3CH=C(CH3)CH(CH3)2.

I would name that

3,4-dimethyl-2-pentene.

To name the given compound "CH3CH=C(CH3)CH(CH3)2," you will need to follow the rules of IUPAC nomenclature for organic compounds. Here's how you can go about it:

1. Identify the longest continuous carbon chain: In this case, there are six carbon atoms in a continuous chain, so it's a hexane.

2. Assign a parent chain: Based on the substituents attached to the chain, locate the substituent with the highest priority. In this case, there are two methyl groups (CH3) on the chain. The parent chain will be numbered in a way that gives the substituents the lowest possible numbers. To do this, start numbering from the end closest to the first substituent.

3. Identify and name the substituents: In this compound, there is a double bond (-C=C-) and a branch consisting of two methyl groups (CH3). The double bond is considered the highest priority and takes precedence over the methyl groups.

4. Number the chain: Start numbering the carbon chain, giving the double bond the lowest possible number. In this case, the double bond is located between the second and third carbon atoms, so we start numbering from the end closest to the double bond.

5. Name the compound: Combine the names of the substituents, the number of the carbon atoms where they are attached, and the parent chain. In this case, the name of the compound is 3-methyl-2-butene.

So, the compound CH3CH=C(CH3)CH(CH3)2 is named as 3-methyl-2-butene.