![]() If more than one OH group appears in the same molecule (polyhydroxy alcohols), suffixes such as - diol and - triol are used.(In cyclic alcohols, the carbon atom bearing the OH group is designated C1, but the 1 is not used in the name.) Substituents are named and numbered as in alkanes. ![]() The number that indicates the position of the OH group is prefixed to the name of the parent hydrocarbon, and the - e ending of the parent alkane is replaced by the suffix - ol.The chain is numbered from the end nearest the OH group. The longest continuous chain (LCC) of carbon atoms containing the OH group is taken as the parent compound-an alkane with the same number of carbon atoms.Here are some basic IUPAC rules for naming alcohols: Alcohols with one to four carbon atoms are frequently called by common names, in which the name of the alkyl group is followed by the word alcohol:Īccording to the International Union of Pure and Applied Chemistry (IUPAC), alcohols are named by changing the ending of the parent alkane name to - ol.
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