Question

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (i) (CH3)2 CHNH2 (ii) CH3(CH2)2NH2 (iii) CH3NHCH(CH3)2 (iv) (CH3)3CNH2 (v) C6H5NHCH3 (vi) (CH3CH2)2NCH3 (vii) m−BrC6H4NH2

Answer 1

Welcome students -

(i) (CH3)2 CHNH2

IUPAC Name => 1-Methylethanamine

Type => Primary amine

(ii) CH3(CH2)2NH2

IUPAC Name => Propan-1-amine

Type => Primary amine

(iii) CH3NHCH(CH3)2

IUPAC Name => N-Methyl-2-methylethanamine

Type => Secondary amine

(iv) (CH3)3CNH2

IUPAC Name => 2-Methylpropan-2-amine

Type => Primary amine

(v) C6H5NHCH3

IUPAC Name => N-methylaniline

Type => Secondary amine

(vi) (CH3CH2)2NCH3

IUPAC Name => N-Ethyl-N-methylethanamine

Type => Tertiary amine

(vii) m−BrC6H4NH2

IUPAC Name => 3-bromoaniline

Type => Primary amine

Best luck...

Answer 2

Answer:

Explanation:

1. (CH3)2 CH NH2 = Propan-2- amine -- primary amine as NH2 grp is attached to 1 carbon only(the question is similar to the nomenclature done in ncert che part 2 amines pg 391)

2. CH3 (CH2)2 NH2 = Propanamine primary amine (NH2 grp is attached to 1 carbon only)

3.CH3 NH CH (CH3)2 = N-methylpropan-2-amine secondary amine( NH grp is attached to 2 carbons)

4.(CH3)3 C NH2 = 2-methylpropan-2-amine. primary amine (NH2 grp is attached to single carbon only)

5.C6H5NHCH3 = N-methylbenzeneamine secondary amine(coz NH grp is attached to 2 carbon chains)

6. (CH3CH2)2 N CH3 N-methyl-N-ethylethanamine tertiary amine(N grp is attached to 1 carbon only)

7. m-Br C6H4 NH2 = meta-bromoaniline primary amine(NH2 grp is attached to 1 carbon chain only)

Done!! Thankyou...