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Arrange the following resonating structu...

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))`

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
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For hydrazoic acid, which of the following resonating structure well be least stable? underset("(I)")(H-N=overset(+)N=overset(-)N)harrunderset(" (II)")(H-overset(+)N-overset(+)N=N^(2-))harrunderset("(III)")(H-overset(-)N-overset(+)N-=N)

Arrange the following carbonium ions in order of decreasing stability : underset(I)underset()((CH_(3))_(3)overset(+)C)" "underset(II)underset()((CH_(3))_(2)overset(+)CH)" "underset(III)underset()(CH_(3)overset(+)CH_(2))" "underset(IV)underset()(overset(+)H_(3)C)

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

Arrange the following resonating structures in the order of decreasing stability : (a) underset(("Vinyl chloride"))underset((I))(CH_(2)=CH-ddotunderset(..)CI: )harrunderset((II))( :overset(Theta)(CH_(2))-CH=overset(o+)underset(..)CI: )harrunderset((III))(overset(o+)CH_(2))-CH=underset(..)ddotCI^(Theta) b. underset(("Formic acid"))underset((IV))(H-overset(ddotO: )overset(||)C)-underset(..)ddotOH harrunderset((V))(H-overset( :ddotO:^(Theta))overset(|)(C)=underset(o+)ddotO)-H harrunderset((VI))(H-overset( :ddotO:^(Theta))overset(|)underset(o+)(C)-underset(..)ddotO-Hharr) underset((VII))(H-underset(ddotTheta)overset( overset(o+):O: )overset(|)C-underset(..)ddotO-H) ( c) Write the resonating structure of phenol in order of decreasing stability.

The decreasing order of stability of the following cations is underset(I)(CH_(3)overset(+)(C)H_(2)) , underset(II)(H_(2)C=overset(+)(C)H) , underset(III)(H-C-=overset(+)(C)) , underset(IV)(H_(3)C-overset(+)(C)=0)

For the given four structures , I to IV, which of the following is correct ? underset((I))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7)) underset((II))(CH_(3)-overset(O)overset(P)(C)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5)) underset((III))(CH_(3)-overset(O)overset(P)(C ) -overset(C_(2)H_(5))overset(|)(C ) H -C_(2)H_(5)) underset((IV))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))

OP TANDON-BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)-OBJECTIVE QUESTIONS (Level-A)
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  2. The electrophile, E^((o+)) attacks the benzene ring to generate the in...

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  3. Which one of the following carbanions is the least stable?

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  4. CH(3)CH(2)Cl undergoes homolytic fission produces:

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  5. Tertiary butyl chloride preferably undergo hydrolysis by:

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  6. In a S(N^(2)) substitution reaction of the type R-Br+Cl^(-)overset("...

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  7. The correct stability order for the following speceis is :

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  8. Arrange the carbanions, (CH(3))(3)bar(C),bar(C)Cl(3),(CH(3))(2)bar(C)H...

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  9. Which of the following carbocations will be more stable?

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  10. Arrange the following free radicals in order of decreasing stability: ...

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  11. The most easily hydrolysed molecule under S(N^(1)) condition is:

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  12. Least active electrophile is :

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  13. In the following carbocation, H//CH(3) that is most likely to migrate ...

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  14. Arrange the following resonating structures in order of increasing sta...

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  15. Identify a species which is not a Bronsted acid but a Lewis acid:

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  16. A solution of (-l)- chloro -1 phenyletane in toluene recemises slowly ...

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  17. The order of stability of the following carbocations: underset("I")(...

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  18. The hyperconjugative stabilities of tert-butyl cation and 2-butene, re...

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  19. KI in acetone, undergoes S(N)2 reaction with each of P,Q ,R and S The ...

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  20. Which of the following molecules is least resonance stabilised?

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