OCR A 6.1.1 Aromatic Compounds REVISION

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OCR A 6.1.1 Aromatic Compounds REVISION

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Күн бұрын

Complete revision for OCR A A Level Chemistry. To buy PowerPoint used in this video please visit my tes shop - www.tes.com/te...

Пікірлер: 36

@RoxyMusic18 2 ай бұрын

I still watch it when I am eating my dinner. So interesting! Thank you for such a great video

@AlleryChemistry 2 ай бұрын

Glad you enjoyed it! 😀

@gemma4787 4 жыл бұрын

These vids are gonna be useful for autumn exam cramming after results day 😂

@AlleryChemistry 4 жыл бұрын

Hope so!

@SP-nd7mf 3 жыл бұрын

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

@exoticeditz8863 Жыл бұрын

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?

@AlleryChemistry Жыл бұрын

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.

@kaybanabraham3838 4 жыл бұрын

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.

@norazenow5320 3 жыл бұрын

Thank you for this, found it extremely useful!

@AlleryChemistry 3 жыл бұрын

You're welcome!

@francismannion7075 Жыл бұрын

Thank you for a very informative lesson.

@AlleryChemistry Жыл бұрын

You are welcome!

@Joe-no4xt 2 жыл бұрын

excellent video, thank you!

@AlleryChemistry 2 жыл бұрын

Glad it was helpful!

@georgemessenger2969 2 жыл бұрын

When phenol reacts with nitric acid, why does substitution only occur and carbons 2 and 4, rather than 6 as well?

@lattifah3918 2 жыл бұрын

You count how close it is to the OH group on the phenol so the carbon 6 would basically be carbon 2.

@atchek6304 4 жыл бұрын

Why isn’t a 6 nitrophenol not produced

@kira._.4267 3 жыл бұрын

2 and 6 nitrophenol are the same thing just flipped so you use the smaller number (i think)

@edward2291 3 жыл бұрын

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).

@khoanguyen-le4368 3 жыл бұрын

yeah, 2& 6 are the same product due to symmetry

@mappc8320 Жыл бұрын

Thank you so much!!!

@AlleryChemistry Жыл бұрын

You're welcome!

@atheneparton5557 3 жыл бұрын

Why is phenol insoluble in water when it has a hydroxy group which forms hydrogen bonds with water ?

@Nataliakennerley 3 жыл бұрын

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.

@annabelcasey-sweeney2592 2 жыл бұрын

If you have a carboxylic acid group attached to a Phenol does Na also attach to the COOH group, replacing the OH?

@jushpatel3280 Жыл бұрын

Do we need to know the exact lengths for benzene single bonds and double bonds

@TheRealDanielTV Жыл бұрын

no just that theyre different

@malanhemal6574 2 жыл бұрын

why can't a 6-nitro nitro phenol be produced? at 35:21 Thank you sir!

@ameliamattison8854 2 жыл бұрын

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)