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COMEDK20269 May 2026Morning ShiftChemistryAminesActual

The number of structural isomers possible for a compound with molecular formula C ₃ H ₉ N is:

Options

  1. A3
  2. B4
  3. C5
  4. D2

Correct answer

B. 4

Step-by-step solution

Degree of unsaturation for C ₃ H ₉ N is 3 - 9 2 + 1 2 + 1 = 0 . The compound is a saturated aliphatic amine. It can exist as primary, secondary, or tertiary amines. Primary amines ( 1^ ): 1. CH ₃ CH ₂ CH ₂ NH ₂ (Propan-1-amine) 2. CH ₃ CH ( NH ₂) CH ₃ (Propan-2-amine) Secondary amines ( 2^ ): 3. CH ₃ CH ₂ NHCH ₃ (N-Methylethanamine) Tertiary amines ( 3^ ): 4. ( CH ₃)₃ N (N,N-Dimethylmethanamine) Total number of structural isomers is 4 . Answer: 4

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