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CBSE Class 12-science Answered

Why aniline readily reacts with bromine to give tri bromo derivative?
Asked by piyush das | 28 Aug, 2011, 12:00: AM
answered-by-expert Expert Answer
addition of bromine to aniline in an electrophilic addition.When the electrophile attacks the ortho and para positions of aniline, the nitrogen atom can donate electron density to the pi system giving four resonance structures This substantially enhances the stability of the cationic intermediate. Here A is representing Br+
Answered by | 29 Aug, 2011, 04:54: PM

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CBSE 12-science - Chemistry
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Asked by shwetayaligar205 | 07 Jul, 2022, 08:13: PM
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CBSE 12-science - Chemistry
sir/madam, this doubt will be lenghty. request peace reading. the doubt is w.r.t chapter Amines; to be specific it is w.r.t basicity of amines. in the topic of the comparision of the basic character of alkylamines with ammonia,  the order of basicity of amines is tertiary> secondary> primary in gaseous phase, only due to the +I effect. in gasous phase only +I effect is shown? also in the aqueous phase, the disturbancy in the order of basicity is due to the sum of effects of +I effect, solvation effect and steric hindrance? the order of the stability of the following in aqueous phase: +I effect: tertiary> secondary> primary solvation: primary > secondary > tertiary steric hindrance: primary > secondary > tertiary so does it means that +I is effected in both gaseous and aqueous phase but solvation and steric hindrance are effected only in aqueous phase? also sir there is an order of basicity when R= CH3 group and when R= C2H5 group: R= CH3: secondary> primary> tertiary R= C2H5: secondary> tertiary> primary so sir can we generalise the order that: when R=CH3 group, the order of basicity: secondary> primary> tertiary and when R> CH3 group, the order of basicity: secondary> tertiary> primary
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CBSE 12-science - Chemistry
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CBSE 12-science - Chemistry
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