hi when you are pointing with the mouse at things it cant be seen in the video and makes it a bit confusing to understand what you are talking about. like at 24:00
Huge thanks, great video! Just wondering how you distinguish between electron donating and withdrawing groups, since any polar compound will have an electronegative and an electropositive side.
At 15:04 it says that benzene has a high electron density. I'm so confused because I thought the delocalised pi system causes low density. Wouldn't the electrons be more dispersed throughout the ring?
Yes, we say high electron density as you essentially have 3 double bonds in benzene however they alternate around the structure essentially delocalising the electrons. Where you have double bonds then we always say it has a higher electron density than a single bond. It is all relative.
Phenol is soluble in water to some extent. It is due to its ability to form hydrogen bonding with water molecules. However the large part of phenol molecule is phenyl group that is non polar and hence its solubility if limited in water. However the polarity of this part too increases in phenoxide ion.
The nitro group on phenol is electron-withdrawing. This has a directing effect to the carbon 3 and 5 (known as meta). The substituent group will only go onto C6 with an electron-adding group (a group usually with a lone pair).
it is but its the same as 2-nitrophenol (they might ask you why there is 2x the amount of one isomer and this is because 2-nitro and 6-nitro are the same)
I still watch it when I am eating my dinner. So interesting! Thank you for such a great video
Glad you enjoyed it! 😀
These vids are gonna be useful for autumn exam cramming after results day 😂
Hope so!
hi when you are pointing with the mouse at things it cant be seen in the video and makes it a bit confusing to understand what you are talking about. like at 24:00
Huge thanks, great video! Just wondering how you distinguish between electron donating and withdrawing groups, since any polar compound will have an electronegative and an electropositive side.
Thank you for this, found it extremely useful!
You're welcome!
excellent video, thank you!
Glad it was helpful!
If you have a carboxylic acid group attached to a Phenol does Na also attach to the COOH group, replacing the OH?
Thank you for a very informative lesson.
You are welcome!
Thank you so much!!!
You're welcome!
At 15:04 it says that benzene has a high electron density. I'm so confused because I thought the delocalised pi system causes low density. Wouldn't the electrons be more dispersed throughout the ring?
Yes, we say high electron density as you essentially have 3 double bonds in benzene however they alternate around the structure essentially delocalising the electrons. Where you have double bonds then we always say it has a higher electron density than a single bond. It is all relative.
When phenol reacts with nitric acid, why does substitution only occur and carbons 2 and 4, rather than 6 as well?
You count how close it is to the OH group on the phenol so the carbon 6 would basically be carbon 2.
Why is phenol insoluble in water when it has a hydroxy group which forms hydrogen bonds with water ?
Phenol is soluble in water to some extent. It is due to its ability to form hydrogen bonding with water molecules.
However the large part of phenol molecule is phenyl group that is non polar and hence its solubility if limited in water. However the polarity of this part too increases in phenoxide ion.
Do we need to know the exact lengths for benzene single bonds and double bonds
no just that theyre different
Why isn’t a 6 nitrophenol not produced
2 and 6 nitrophenol are the same thing just flipped so you use the smaller number (i think)
The nitro group on phenol is electron-withdrawing. This has a directing effect to the carbon 3 and 5 (known as meta). The substituent group will only go onto C6 with an electron-adding group (a group usually with a lone pair).
yeah, 2& 6 are the same product due to symmetry
19:22
why can't a 6-nitro nitro phenol be produced? at 35:21 Thank you sir!
it is but its the same as 2-nitrophenol (they might ask you why there is 2x the amount of one isomer and this is because 2-nitro and 6-nitro are the same)
Hi
Can someone give me the time for each topic when it starts please.
Thanks
the friedal crafts mechanism isnt on the spec
hello bozo