A) \[IV<III<II<I\]
B) \[IV<III<I<II\]
C) \[I<II<III<IV\]
D) \[IV<I<II<III\]
Correct Answer: D
Solution :
In gaseous phase, the basic strength of alkyl amines follows the following order \[{{3}^{o}}>{{2}^{o}}>{{1}^{o}}\] This is because of the presence of electron releasing \[-C{{H}_{3}}\] group which increases the electron density over nitrogen and thus, makes the more availability of lone pair for donation. Hence, the correct order of basic strength is \[\underset{(III)}{\mathop{{{(C{{H}_{3}})}_{3}}N}}\,>\underset{(II)}{\mathop{{{(C{{H}_{3}})}_{2}}NH}}\,>\underset{(I)}{\mathop{C{{H}_{3}}N{{H}_{2}}}}\,\] \[\underset{(IV)}{\mathop{>\underset{\begin{smallmatrix} (because\,of\,electron\, \\ withdrawing\,Ph\,\,group) \end{smallmatrix}}{\mathop{{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}}}\,}}\,\]You need to login to perform this action.
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