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The correct stability order of the follo...

The correct stability order of the following resonance structures is
`(I)H_(2)C = overset(+)N = overset(-)N" "(II)H_(2)overset(+)C - N = overset(-)N`
`(III)H_(2)overset(-)C - overset(+)N = N" "(IV)H_(2)overset(-)C - N = overset(+)N`

A

`(I) gt (II) gt (IV) gt (III)`

B

`(I) gt (III) gt (II) gt (IV)`

C

`(II) gt (I) gt (III) gt (IV)`

D

`(III) gt (I) gt (IV) gt (II)`

Text Solution

Verified by Experts

The correct Answer is:
B
(i)Greater the number of `pi-`bonds, greater is the delocalisation of electrons, greater is the stability.
(ii) A reaonating structure is more stable is the
negative charge is on electronegative atom and
positive charge on electropositive atom.
(iii) Like charge should not be close and unlike
charges should not be widely separated .
Keeping above points in view , the stability order
will be `(I) gt (III) gt (II) gt (IV)` .
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Explore conceptually related problems

Give the stability of the following resonance structures (a) H_(2)C = overset(o+)N =overset(Θ) (b) H_(2)overset(o+)C -N =overset(Θ)N (c ) H_(2)overset(Θ)C -overset(o+)N -= N (d) H_(2) overset(Θ)C - N = overset(o+)N .

The correct order of stabilities of the following resonance structures is : (I) H_2 C = overset (oplus) N = overset (Ө) N (II) H_2 overset (oplus) C - N = overset (Ө) N (III) H_2 overset (Ө) C - overset (oplus) N -= N (IV) H_2 overset (Ө) C - N = overset (oplus) N .

The correct stability order of the following resonance structures is : x H_(2)C=overset(o+)underset((I))N=overset(Ɵ)N H_(2)overset(o+)Cunderset((II))-N=overset(Ɵ)N H_(2)overset(Ɵ)C-underset((III))overset(o+)N-=N H_(2)overset(Ɵ)C-underset((IV))N=overset(o+)N

The correct stability order of the following resonance structrue is : H_2 C = overset (+)(N) = overline(N) H_2 overset (+)C = (N) = overline(N) H_2overline( C) - overset (+) (N) -= N H_2overline( C) - overset (+) (N) -= N .

The correct stability order of the following resonance structure is: {:(CH_(2)=C=O,H_(2)overset(-)(C)-overset(+)(C)=O,H_(2)O=overset(+)(C)-overset(-)(O) , H_(2)overset(-)(C)-C-=O),((I),(II),(III),"(IV)"):}

Arrange the following resonating structures in order of increasing stability underset((I))(CH_(2)=overset(+)(N)=overset(-)(N))" "underset((II))(H_(2)overset(+)(C)=N=overset(-)(N))" "underset((III))(H_(2)overset(-)(C)-overset(+)(N) equiv N)" "underset((IV))(H_(2) overset(-)(C)-N=overset(+)(N))

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