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13.4     Arrange the following:

                (iv) In decreasing order of basic strength in gas phase:

                C_{2}H_{5}NH_{2},     (C_{2}H_{5})_{2}NH,     (C_{2}H_{5})_{3}N, and  NH_{3}

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Decreasing order of basic strength in the gas phase-

(C_{2}H_{5})_{3}N>(C_{2}H_{5})_{2}NH>C_{2}H_{5}NH_{2}>NH_{3}

In the gas phase, there is no solvation effect. So, the basicity directly depends on the number of electron donation group. More is the electron donating group, higher is the +I effect and if the size of the donating group is large +I effect should also high.

 

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manish

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