IUPAC system and IUPAC rules of naming of amines

Aliphatic amines are named by adding the suffix amine to the name of the alkyl group and it is written as one word. E.g., C2H5NH2 is Ethylamine. When two or more alkyl groups in secondary or tertiary amines are some, the prefix di or tri is used. For e.g., (C2H5)2 NH is diethylamine.

In the case of mixed amines, the names of alkyl groups are arranged in alphabetical order. The amines are named as N-substituted derivatives of the largest group of primary amine.


(C2H5)2NCH2CH2CH2CH3 - N, N - diethyl butylamine

aliphatic amines nomenclature

In the IUPAC system the amines are considered to be amino derivatives of corresponding alkanes. Therefore, they are called aminoalkanes or alkanamines. These names are obtained either by adding a prefix amino before the name of parent alkane or by replacing 'e' from the name of the parent alkene with suffix amine.


aliphatic amines nomenclature

aliphatic amines nomenclature

aliphatic amines nomenclature

In case of diamines the ending e of the hydrocarbon name is retained and the suffix diamine is added H2N-(CH2)5-NH2 is 1,5 - Pentanediamine.

When additional functional groups such as -OH or double bond are present in an amine, the prevailing priority order for nomenclature is observed.

H2N CH2 CH2 OH 2 - amino ethanol

H2N CH2 CH = CH2 is 2 - propen1 - amine

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