Arrange the following set of compounds in increasing order of decreasing reactivity of electrophiles nbsp- chlorobenzene- nbsp- nbsp-2-4-dinitrobenzene nbsp- nbsp- p-nitrochlorobenzene

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Standard XII

Chemistry

Acidity of Alcohols and Phenols

arrange the f...

Question

arrange the following set of compounds in increasing order of decreasing reactivity of electrophiles
chlorobenzene, 2,4-dinitrobenzene p-nitrochlorobenzene

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Solution

Dear Student, electrophiles are reagents that participate in a reaction by accepting an electron pair in order to bond to nucleophiles. The higher the electron density on a benzene ring, the more reactive is the compound towards an electrophile, E+ (Electrophilic reaction). The presence of an electron withdrawing group (i.e., NO2- and Cl-) deactivates the aromatic ring by decreasing the electron density. Since NO2- group is more electron withdrawing (due to resonance effect) than the Cl- group (due to inductive effect), the decreasing order of reactivity is as follows: Chlorobenzene > p - nitrochlorobenzene > 2, 4 - dinitrochlorobenzene. Regards,

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Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E⁺

(a) Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene

(b) Toluene, p-H₃C–C₆H₄–NO₂, p-O₂N–C₆H₄–NO₂.

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, $E^{+}$
(a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene

(b)Toluene, $p - H_{3} C - C_{6} H_{4} - N O_{2}, p - O_{2} N - C_{6} H_{4} - N O_{2} .$

Q. Rank the following compounds in order of decreasing reactivity toward electrophilic substitution (most reactive first).

(I)

Chlorobenzene

(I I)

4-nitrochlorobenzene

(I I I)

2,4-dinitrochlorobenzene

(I V)

2,4,6-trinitrochlorobenzene

Q. Arrange the following compounds in increasing order of their reactivity with sodium hydroxide solution:

[o-nitrochlorobenzene, chlorobenzene, benzyl chloride]

(I) C h l o r o b e n z e n e

(I I) 2, 4 - d i n i t r o c h l o r o b e n z e n e

(I I I) p - n i t r o c h l o r o b e n z e n e

The decreasing order of their reactivities towards electrophilic substitution reaction is:

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arrange the following set of compounds in increasing order of decreasing reactivity of electrophiles chlorobenzene, 2,4-dinitrobenzene p-nitrochlorobenzene

arrange the following set of compounds in increasing order of decreasing reactivity of electrophiles
chlorobenzene, 2,4-dinitrobenzene p-nitrochlorobenzene