InterviewSolution
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InterviewSolution
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Among the following, the least and the best `H^(Θ)` ion donor, respectively, are:A. B. C. D. |
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Answer» Correct Answer - A::D `(-NO_(2))` has `bar e`-withdrawing effect at o-, m- and p-positions. Less `bar e`-withdrawing will be better `H^(Θ)` donor. EW order of `NO_(2)`: `{:(m-NO_(2),lt,p-NO_(2),lt,o-NO_(2)),((I),,(II),,(III)),(("Only -I at m-"),,(underset("at p-")("-R and -I")),,(underset("than (I) and (II)")underset("so net more EW")underset("-I at orarr-I at p-")("-R and -I, but"))):}` Decreasing order of `overset(Θ)(H)` donor. `underset(("Best"))(d)("standard")gt (c )gt underset(("Least"))(b)gt(a)` |
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