OH

CH3-CH=C-CH-CH3

CH3

The OH is a single bond connected to the third Carbon and The CH3 is a single bond connected to the 4 Carbon HOW would name that?

I would name it as

3-hydroxy-4-methyl-2-pentene

OH CH4 CH2 CH CH CH CH3 CH3

CH5 CH4 CH5 CH4 CH CH CH 5 CH5
CH1 CH3 CH2 CH2 CH2 CH3 CH3 CH2
CH5 CH5 CH5 CH4 CH5 CH5 CH4 CH5

To name the given compound, we need to identify the longest continuous carbon chain and number the carbons in such a way that the substituents have the lowest possible numbers. Here's how you can do it:

1. Identify the longest continuous carbon chain in the structure. In this case, the longest chain has 5 carbons: CH3-CH-C=CH-CH3.

2. Number the carbon atoms in the chain starting from the end with the substituent(s) closest to it. In this case, we have an OH group attached to the third carbon and a CH3 group attached to the fourth carbon.

3. Write down the names of the substituents alphabetically and prefix them to the name of the chain. In this case, the OH group is called hydroxyl and the CH3 group is called methyl.

4. Combine the names of the substituents with the name of the chain. The chain is a pentane (since it has 5 carbons).

5. Alphabetize the names of the substituents and separate them by commas. So, in this case, the order will be: 3-hydroxypentane,4-methylpentane.

Therefore, the name for the given compound is 3-hydroxypentane,4-methylpentane.