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How are amines classified ? |
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Answer» Solution :Amines are classified on the bass of the NUMBER of hydrogen atoms of ammonia that are replaced by alkyl group . Amines are classified as PRIMARY `(1^(@))` , SECONDARY `(2^(@))` and tertiary `(3^(@))` . (1) Primary amines `(1^(@) "amines")` : The amines in which only one hydrogen atom of ammonia is replaced by an alkyl or aryl group are called primary `(1^(@))`amines. Example : `CH_(3)-NH_(2)` methylamine. (2) Secondary amines `(2^(@)" amines" )` : The amines in which two hydrogem atoms of ammonia are replaced by two , same or different alkyl or aryl groups are called secondary `(2^(@))` amines. Example : `C_(2)H_(5)-NH-CH_(3)` ethylmethylamine. (3) Tertiary amines `(3^(@) "amines")` : The amines in which all the three hydrogen atom of ammonia are replaced by three same or different alkyl or aryl groups are called tertiary `(3^(@))` amines. Example :`CH_(3)-overset(CH_(3))overset(|)N-CH_(3)` trimethylamine Secondary and tertiary are further classified as (1) Simple/symmetrical amines (2) Mixed/or unsymmetrical amines. (3) Simple /symmetrical amines: In simple amines same alkyl group are attached to the nitrogen , e.g, `C_(2)H_(5)-NH-C_(2)H_(5)` Diethylamine `CH_(3)-UNDERSET(CH_(3))underset(|)N-CH_(3)`Trimethylamine (2) Mixed or unsymmetrical amines : In mixed amines different alkyl gropus are attached to the nitrogen. `C_(2)H_(5)-overset(CH_(3))-overset(|)N-C_(2)H_(5)` Diethyl methylamine `CH_(3)-NH_C_(2)H_(5)` Ethyl methylamine |
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