13.13. How will you convert benzene into (i)p-nitrobromobenzene (ii) m-nitrochlorobenzene (iii) p-nitrotoluene (iv) acetophenone?

(i) The two substituents in the benzene ring are present at p-positions. Therefore, the sequence of reactions should be such that first an o, p-directing group, i.e., Br atom should be introduced in the benzene ring and this should be followed by nitration. Thus,

 

(ii) Here since the two substituents are at p-position w.r.t. each other, therefore, the first substituent in the benzene ring should be a o, p-directing group (i.e., CH₃) and then the other group (i.e., NO₂) should be introduced. Therefore, the sequence of reactions is:

 

(iii) Here since the two substituents are at m-position w.r.t. each other, therefore

...more

(i) The two substituents in the benzene ring are present at p-positions. Therefore, the sequence of reactions should be such that first an o, p-directing group, i.e., Br atom should be introduced in the benzene ring and this should be followed by nitration. Thus,

 

(ii) Here since the two substituents are at p-position w.r.t. each other, therefore, the first substituent in the benzene ring should be a o, p-directing group (i.e., CH₃) and then the other group (i.e., NO₂) should be introduced. Therefore, the sequence of reactions is:

 

(iii) Here since the two substituents are at m-position w.r.t. each other, therefore, the first substituent in the benzene ring should be a m-directing group (i.e., NO₂) and then other group (i.e., Cl) should be introduced.

(iv) Acetophenone can be prepared by F.C. acylation using either acetyl chloride or acetic anhydride.

 

less

<p><strong> (i)</strong> The two substituents in the benzene ring are present at p-positions. Therefore, the sequence of reactions should be such that first an o, p-directing group, i.e., Br atom should be introduced in the benzene ring and this should be followed by nitration. Thus,</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1742367485phpLTiKkL_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1742367485phpLTiKkL.jpeg" alt="" width="676" height="212"></picture></div><div>&nbsp;</div><div><strong> (ii)&nbsp;</strong>Here since the two substituents are at p-position w.r.t. each other, therefore, the first substituent in the benzene ring should be a o, p-directing group (i.e., CH₃) and then the other group (i.e., NO₂) should be introduced. Therefore, the sequence of reactions is:<br><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1742367544phpKCe4en_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1742367544phpKCe4en.jpeg" alt="" width="681" height="109"></picture></div><div>&nbsp;</div><div><strong> (iii)&nbsp;</strong>Here since the two substituents are at m-position w.r.t. each other, therefore, the first substituent in the benzene ring should be a m-directing group (i.e., NO₂) and then other group (i.e., Cl) should be introduced.<br><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1742368212phpJWh81A_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1742368212phpJWh81A.jpeg" alt="" width="518" height="153"></picture></div><div><span lang="EN-IN"><strong>(iv) </strong>Acetophenone can be prepared by F.C. acylation using either acetyl chloride or acetic anhydride.</span></div><div><div class="photo-widget-full"><div class="figure"><picture><source srcset="" media="(max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/1752142893phpVKpkaN.jpeg" alt="" width="861" height="330" loading="lazy"></picture></div></div></div><div>&nbsp;</div></div></div></div></div></div>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment