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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Why can aryl halides not be prepared by reaction of phenol with HCl in the presence of ZnClX2?

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प्रश्न

Why can aryl halides not be prepared by reaction of phenol with \[\ce{HCl}\] in the presence of \[\ce{ZnCl2}\]?

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उत्तर

Aryl halides can't be prepared by reaction of phenol with \[\ce{HCl}\] in presence of \[\ce{ZnCl2}\] because the carbon-oxygen bond in phenols has partial double bond character and it, being stronger than a single bond, is difficult to break.

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पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १४४]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 10 Haloalkanes and Haloarenes
Exercises | Q III. 63. | पृष्ठ १४४

संबंधित प्रश्‍न

Draw the structure of the major monohalo product in the following reaction:


Name the following halide according to the IUPAC system and classify it as an alkyl, allyl, benzoyl (primary, secondary, tertiary), vinyl or aryl halide:

(CH3)3CCH2CH(Br)C6H5


Name the following halide according to the IUPAC system and classify it as an alkyl, allyl, benzoyl (primary, secondary, tertiary), vinyl or aryl halide:

CH3CH = C(Cl)CH2CH(CH3)2


Name the following halide according to the IUPAC system and classify it as an alkyl, allyl, benzoyl (primary, secondary, tertiary), vinyl or aryl halide:

m-ClCH2C6H4CH2C(CH3)3


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Which of the following structures is enantiomeric with the molecule (A) given below:


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\[\ce{CH3CH = CH2 + HI -> \underset{(A)}{CH3CH2CH2I} + \underset{(B)}{CH3CHICH3}}\]


Name the following halides according to the IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:

\[\ce{CH3C(C2H5)2CH2Br}\]


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\[\ce{CH3C(C2H5)2CH2Br}\]


Name the following halide according to the IUPAC system and classify it as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl, or aryl halide:

\[\ce{CH3C(C2H5)2CH2Br}\]


Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:

  CH3C(Cl)(C2H5 )CH2CH3


Name the following halide according to IUPAC system and classify as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:

\[\ce{CH3C(C2H5)2CH2Br}\]


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\[\ce{CH3CH2C(CH3)2CH2I}\] 


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The given compound

 

is an example of__________.


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