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In Kolbe's reactio insteaded of phenol, ...

In Kolbe's reactio insteaded of phenol, phenoxide ion is treated with carbon dioxide. Why ?

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Carbon dioxide (O=C=O) is a weak electrophile. For its needs a ring which is highly activated. Now phenoxide ion with a negative charge on oxygen is more reactive towards the attacking electrophile as compared to phenol. That is why, in Kolbe's reaction phenoxide ion is preferred over phenol for reaction wiht carbon dioxide. For mechanism, consult section 16
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DINESH PUBLICATION-ETHERS-SHORT ANSWER TYPE QUESTIONS
  1. Arrange the following compounds in decreasing order of acidity. H(2)...

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  2. Name the enzymes and write the reactions involved in the preparation o...

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  3. How can propan-2-one be converted into tert-butyl alcohol ?

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  4. Write the structures of the isomers of alcohols with molecular formula...

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  5. Explain why is OH group in phenols more strongly held as compared to O...

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  6. Explain why nucleophilic substitution reactions rae not very common in...

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  7. Preparation of alcohols from alkenes involves the electrophilic attack...

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  8. Explain why is O=C=O non polar while R-O-R is polar ?

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  9. Why is the reactivity of all the three classes of alcohols with conc. ...

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  10. Write steps to carry out the conversion of phenol to aspirin.

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  11. Nitration is an example of aromatic electrophilic substitution and its...

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  12. In Kolbe's reactio insteaded of phenol, phenoxide ion is treated with ...

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  13. Dipole moment of phenol is smaller than that of methanol. Why ?

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  14. Ethers can be prepared by Williamson synthesis in which an alkyl halid...

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  15. Why is the C-O-H bond angle in alcohols slightly less than the tetrahe...

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  16. Explain why low molecular mass alcohols are soluble in water ?

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  17. Explain why p-nitrophenol is more acidic than phenol ?

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  18. Explain why alcohols and ethers of comparable molecular mass have diff...

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  19. The carbon-oxygen bond in phenol is slightly stronger than that in met...

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  20. Arrange water, ethanol and phenol in increasing order of acidity and g...

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