Work Step by Step
1. Find the longest carbon chain with -OH and number it giving -OH the least number. 2. Locate the Cl and Methyl. 3. Locate the double bond which would be 2. 4. Write the name by dropping e from the name of the longest chain and end with an -ol. 5. It's E because the highest priority groups like on different sides of the double bond. Since chlorine is at the 2th carbon after numbering the chain from left to right, it will be 2-chloro and methyl at 3 so 3-methyl. The double bond is at 2 so pent-2-en and since alcohol is at 1, it will be -1-ol.