If a carbonyl group is present, the -OH group is named with the prefix "hydroxy," with the carbonyl group attached to the parent chain name so that it ends with - al or - one.Įthan e: CH 3CH 3 ->Ethan ol: (the alcohol found in beer, wine and other consumed sprits) When multiple alcohols are present use di, tri, et.c before the ol, after the parent name. Remove the final e from the parent alkane chain and add - ol.When multiple -OH groups are on the cyclic structure, number the carbons on which the -OH groups reside.When naming a cyclic structure, the -OH is assumed to be on the first carbon unless the carbonyl group is present, in which case the later will get priority at the first carbon.With the exception of carbonyl groups such as ketones and aldehydes, the alcohol or hydroxy groups have first priority for naming. Place the OH on the lowest possible number for the chain.If there is a chain with more carbons than the one containing the OH group it will be named as a subsitutent. Find the longest chain containing the hydroxy group (OH).
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