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Learn Intext Exercise 11.4 with Free Lessons & Tips

Give structures of the products you would expect when each of the following alcohol reacts with (a) HCl-ZnCl2 (b) HBr and (c) SOCl2.

(i) Butan-1-ol

(ii) 2-Methylbutan-2-ol

(a)

(i)

Primary alcohols do not react appreciably with Lucas’ reagent (HCl-ZnCl2) at room temperature.

(ii)

Tertiary alcohols react immediately with Lucas’ reagent.

(b)

(i)

(ii)

(c)

(i)

(ii)

Comments

Predict the major product of acid catalysed dehydration of

(i) 1-Methylcyclohexanol and

(ii) Butan-1-ol

(i)

(ii)

Comments

Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.

Resonance structure of the phenoxide ion

Resonance structures of p-nitrophenoxide ion

Resonance structures of o-nitrophenoxide ion

It can be observed that the presence of nitro groups increases the stability of phenoxide ion.

Comments

Write the equations involved in the following reactions:

(i) Reimer-Tiemann reaction

(ii) Kolbe’s reaction

 

  1. Reimer-Tiemann reaction

  1. Kolbe’s reaction

Comments

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