Provide the formal name for the following alcohol.

• A. 3-isopropyl-4,5,6-trimethyloctanol
• B. 2-isopropyl-1,3,4,5-tetramethylheptanol
• C. 3-isopropyl-4,5,6-trimethyl-2-octanol
• D. 6-isopropyl-3,4,5-trimethyl-2-octanol

Answer: (C)

Verified step by step guidance

1. Identify the longest carbon chain that contains the hydroxyl (-OH) group. This chain determines the base name of the alcohol. In this case, count the carbons in the main chain including the carbon bonded to the -OH group.
2. Number the carbon chain starting from the end nearest to the hydroxyl group to give the -OH the lowest possible number. This ensures the correct position of the alcohol group is indicated in the name.
3. Identify and locate all substituents (alkyl groups) attached to the main chain. Note their positions based on the numbering from step 2. Here, you have isopropyl and methyl groups attached at various carbons.
4. Combine the substituent names and their positions in alphabetical order, followed by the position and name of the hydroxyl group. Use hyphens to separate numbers and commas to separate multiple numbers. The suffix '-ol' indicates the presence of the alcohol group.
5. Write the full name by placing the substituents with their positions before the base name of the alcohol, ensuring the position of the -OH group is included. For example, if the -OH is on carbon 2 of an octane chain with substituents at carbons 3, 4, 5, and 6, the name will reflect these positions accordingly.