Which class of organic compounds can be represented as R -- OH?
A. Acids.
B. Ethers.
C. Esters.
D. Alcohols.
Alcohols by definition have the --OH group covalently bonded to the end of a hydrocarbon (R ). organic acids have the formula R --COOH; esters have the formula R1--COOH--R2; ethers have the formula R1--O--R2.