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STD 11 - 8.4. Organic chemistry reaction mechanism — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 8.4. Organic chemistry reaction mechanism4 Marks
MCQ
Correct order of basic strengths of given amines is
  • A
    $\mathop {M{e_2}NH}\limits_{{2^o}}  > \mathop {MeN{H_2}}\limits_{{1^o}}  > \mathop {M{e_3}N}\limits_{{3^o}}  > N{H_3}\,$ (Protic solvent)
  • B
    $\mathop {E{t_2}NH}\limits_{{2^o}}  > \mathop {E{t_3}H}\limits_{{3^o}}  > \mathop {EtN{H_2}}\limits_{{1^o}}  > N{H_3}$ (Protic solvent)
  • C
    $Me_3N > Me_2NH > Me - NH_2 > NH_3$ (Gas phase)
  • ✓
    All are correct
✓

Answer

Correct option: D.
All are correct
d
$(d)$  $(a)$ $\mathop {M{e_2}NH}\limits_{{2^o}}  > \mathop {MeN{H_2}}\limits_{{1^o}}  > \mathop {M{e_3}N}\limits_{{3^o}}  > N{H_3}\,$ if ($R = -$  Meor Butyl) (in polar protic solvent) 
$(b)\, 2^o > 3^o > 1^o > NH_3$ if $(R = -Et)$
$(c)\, 3^o > 2^o > 1^o > NH_3$ (Gas phase)

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