00:01
When a lone pair containing substituent is directly attached to a benzene ring that lone pair containing substituent activates the benzene ring for ortho and para director activates the benzene ring and act as ortho -para director so this is a lone pair containing substituent and it will act as a ortho -para director when a benzene ring is directly attached with a substituent that is containing a multiple bond or we can say when a benzene ring is directly attached with a multiple bond containing substituent that substituent will deactivate the benzene ring and act as a meta -director.
00:53
Here, because of resonance, this double bond will migrate and because of resonance, this double bond pair resonance process will take place as a result in ortho and para position positive charge will appear when a benzene ring is directly attached with a multiple bond containing substituent.
01:16
When a lone pair containing substituent is directly attached, a resonance process will take place.
01:23
As a result of resonance, a negative charge will appear in ortho and para position.
01:29
As a result, this lone pair containing substituent will act as an ortho para director.
01:38
In this question, we are given some sets of substituent pairs.
01:43
The first set, we are given 3n, no2 and po3n.
01:51
In this set, we have to identify which set will act as an ortho para director.
01:56
So here, this cn is a multiple bond containing substituent.
02:02
No2 also contains a multiple bond and po3n also contains a multiple bond.
02:08
So here, all the 3 substituents act as a meta -directing substituent.
02:14
In the second option, we are given cl.
02:19
Cl is a lone pair containing substituent and another substituent is hydroxide that is oh that also contains a lone pair containing substituent...