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Consider $\ce{C3H7NH2}$. Can one make $3$ different isomers with this molecular formula? My question is that are they functional group isomers or chain isomers?

I have been told that they are functional group isomers but I intuitively think that they are chain isomers.

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  • $\begingroup$ I can make four different isomers of this. $\endgroup$
    – Ivan Neretin
    Commented Nov 3, 2015 at 12:50
  • $\begingroup$ Yes I know we can , but my question is are they functional group or chain ? $\endgroup$
    – Akshay Pratap Singh
    Commented Nov 3, 2015 at 13:08

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When we talk about chain isomers we mean isomers with different carbon skeleton.

If the carbon skeleton is changing as well as the functional group we report it as functional group isomerism.

For the given compound in your question, primary, secondary and tertiary amines will show functional group isomerism, as they are forming different types of amines itself.

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  • $\begingroup$ That's incorrect - for amines it can be considered position isomerism, definitely not functional. $\endgroup$
    – Mithoron
    Commented Aug 22, 2022 at 14:38

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