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Arrange the following in the increasing ...

Arrange the following in the increasing order of their basicities.
(I) `p-`Toluidine
(II) `N,N-`Dimethyl-p-toluidine
(III) `p-`Nitroaniline`
(IV) Aniline.

Text Solution

Verified by Experts

`III lt IV lt I lt II` or `II gt IV gt III`
(II) (`+I` effect of two `Me` groups of `N` atom and `Me` group ar `p` position (`+ I` and `H.C` effects) (highest basic).
(I) `+ I` and `H.C` effects of `(Me)` group at `p` position.
(IV) (Standard)(Aniline)
(III) `-I` and `-R` effect of `(-NO_2)` group at `p` position.
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Knowledge Check

  • Choose the most appropriate options. Arrange the following in the decreasing order of basic character . I. p-toluidine II. N,N-dimethyl-p-toluidine III. p-nitroaniline IV. Aniline

    A
    `II gt III gt I gt IV `
    B
    `I gt II gt III gt IV`
    C
    `II gt I gt IV gt III`
    D
    `IV gt III gt I gt II`

  • Arrange the following amines in the decreasing order of their basic strength Aniline (I), Benzylamine (II), p-toluidine (III)

    A
    `I gt II gt III`
    B
    `III gt II gt I`
    C
    `II gt I gt III`
    D
    `III gt I gt II`

  • Arrange the following in decreasing order of their boiling points: (I) n-Butane (II) 2-Methylbutane, (III) n-Pentane (IV) 2,2-Dimethylpropane

    A
    IgtIIgtIIIgtIV
    B
    IIgtIIIgtIVgtI
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    IVgtIIIgtIIgtI
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