The prefix "n-" (or normal) is provided when every carbons form a continuous, unbranched (linear) chain. If a functional group (such together an alcohol) is existing that functional team is top top the finish of the chain. No to be puzzled with "nor", which shows a absent methyl group.
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|Common name: n-pentane IUPAC name: pentane||Common name: n-pentanol IUPAC name: 1-pentanol|
|Common name: isopentane IUPAC name: 2-methylbutane||Common name: isopentyl alcohol IUPAC name: 3-methyl-1-butanol|
|Common name: phthalic acid IUPAC name: benzene-1,2-dicarboxylic mountain||Common name: isophthalic acid IUPAC name: benzene-1,3-dicarboxylic acid|
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|Common name: neopentane IUPAC name: 2,2-dimethylpropane||Common name: neopentyl alcohol IUPAC name: 2,2-dimethyl-1-propanol|
The prefix "sec" or "s" is used when the functional group is bonded to a secondary carbon. This prefix is only beneficial for a four-carbon chain. The is not applicable v a much shorter chain, and also it is often ambiguous when the chain has 5 or an ext carbons.