Question
Explain the fact that in aryl alkyl ethers (i) the alkoxy group activates the benzene ring towards electrophilic substitution and (ii) it directs the incoming substituents to ortho and para positions in benzene ring.
✓
Answer
1-In aryl alkyl ethers the alkoxy group show + R effect and increases the electron density in the benzene ring. Hence, the alkoxy group activates the benzene ring towards electrophilic substitution.
(ii) Due to resonance ( + M effect) the electron density increases at ortho and para positions, hence, incoming electrophile attacks the ortho and para positions. This can be explained by the following resonance structures :
(ii) Due to resonance ( + M effect) the electron density increases at ortho and para positions, hence, incoming electrophile attacks the ortho and para positions. This can be explained by the following resonance structures :
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Explain decarboxylation reaction of carboxylic acids.
Match the structures of the compounds given in Column I with the name of the compounds given in Column II.
| Column I | Column II | ||
| (i) |  |
(a) | Hydroquinone |
| (ii) |  |
(b) | Phenetole |
| (iii) |  |
(c) | Catechol |
| (iv) |  |
(d) | o-Cresol |
| (v) |  |
(e) | Quinone |
| (vi) |  |
(f) | Resorcinol |
| (g) | Anisole. |
Explain position of d-Block in periodic table.
Complete the following reaction by identifying A, B and C.
$\text{A}+\text{H}_2\text{(g)}\xrightarrow{ \ \ \text{Pd/BaSO}_4\ \ }\text{(CH}_3)_2\text{CH}-\text{CHO}$
→$\text{A}+\text{H}_2\text{(g)}\xrightarrow{ \ \ \text{Pd/BaSO}_4\ \ }\text{(CH}_3)_2\text{CH}-\text{CHO}$
Explain the limitations of Raoult's law.
Arrange the following compounds in increasing order of acidity and give a suitable explanation. Phenol, $o-$nitrophenol, $o-$cresol.
→Give reasons for the following observations:
Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction.
Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction.
Which one in the following pairs undergoes $\ce{S_N1}$ substitution reaction faster and why?
→Explain the following :
(a) Transition elements show variable oxidation states.
(b) The paramagnetic character in $3 d$ transition series elements increases upto Mn and then decreases.
→(a) Transition elements show variable oxidation states.
(b) The paramagnetic character in $3 d$ transition series elements increases upto Mn and then decreases.
Describe a method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.