how many primary amines are possible for the formula C4H11N Share with your friends Share 2 Soniya Dash answered this 4 isomers..namely..n-Butylaminesec-Butylaminetert-ButylamineDiethylamineIsobutylamine -5 View Full Answer Soniya Dash answered this or by position isomerism... -2 Sreeja answered this 4 4 Parshv Sanghavi answered this Its 3. As per u have asked just primary amines.They are n - butanamine, Butan - 2 - amine and 2 methyl propan - 2 - amine....... 0 G Chakradhar Reddy answered this 4 isomers -1 Cheshta Sareen answered this 4, n-butylamine, sec-butylamine, isobutylamine, tertiarybutylamine 0