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Arrange the following : 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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Answer» Solution :In the gas phase, basic strength mainly depends upon the +I-effect of the alkyl GROUPS. +I-effect increases with the NUMBER of alkyl groups, therefore, the basic strength of the amines DECREASES as the number of ethyl groups decreases from 3 in `(C_(2)H_(5))_(3)N` to 2 in `(C_(2)H_(5))_(2)NH` to 1 in `C_(2)H_(5)NH_(2)` and zero in `NH_(3)`. Thus, basic strength in the gas phase decreases in the order : `(C_(2)H_(5))_(3)N gt (C_(2)H_(5))_(2)NH gt C_(2)H_(5)NH_(2) gt NH_(3)` |
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