\[\underset{4}{\mathop{C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-N{{H}_{2}}}}\,\] [IIT-JEE (Screening) 2001]
A) \[2>1>3>4\]
B) \[1>3>2>4\]
C) \[3>1>2>4\]
D) \[1>2>3>4\]
Correct Answer: B
Solution :
The relative basic charecter of \[{{1}^{o}},{{2}^{o}}\] and \[{{3}^{o}}\] amines also depends upon the nature of the alkyl group. \[R\] Relative basic strength \[-C{{H}_{3}}\] \[{{R}_{2}}NH>R-N{{H}_{2}}>{{R}_{3}}N>N{{H}_{3}}\] \[-{{C}_{2}}{{H}_{5}}\] \[{{R}_{2}}NH>R-N{{H}_{2}}>N{{H}_{3}}>{{R}_{3}}N\] \[-CHM{{e}_{2}}\] \[R-N{{H}_{2}}>N{{H}_{3}}>{{R}_{2}}NH>{{R}_{3}}N\] \[-CM{{e}_{3}}\] \[N{{H}_{3}}>R-N{{H}_{2}}>{{R}_{2}}NH>{{R}_{3}}N\]
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