Thanks for these videos! I have recapped and learned even more than when I was an undergraduate. Cant wait for amino acids, titrations, and spectroscopy!! please hurry!!
why is it that in F.C acylations the catalyst, like Al Cl3 is almost always used in a stoichiometric ratio with the reactants ? if it is truly just a catalyst, and is regenerated, why is this always done ? I have seen text's alluding to the idea that the catalyst is actually complexed with the reaction product, and in fact the final reaction product is only recovered when water is added to hydrolyse the complex...if this is true, then strictly speaking, the lewis acid is not a true catalyst, but more a of a co reactant...right ?...because if water is needed to free the product , it would destroy the lewis acid anyway !
MY previous question is: Why it became AlCl4- in 1st step. Al is electropositive instead could give e- to become AlCl2+ as metals can be stabilized by positive charge and halogens by negative charge...Also Al is big so +ive charge coulld be stabilized.. Please help?? No one tells the reason for 1st step..
hi, I believe it's because Cl itself is located further to the right of the periodic table than Al, this causes Cl to be way more electronegative than Al, all 3 Cl bonded with Al are slightly negatively charged and pulls the electron from the Al, making it slightly positively charged. And since the covalent bonding shares a total of 6 electrons on AlCl3, it needs to ACCEPT electrons to reach the 8 number rather than LOSING the electrons. Hope you get what I mean and if I am wrong please do correct me. Fellow A-level student here.
I don't know the exact reason. But i think, Aluminium has flexible d orbitals so it can gain electrons and still be stable moreover,that product ie. (Alcl4-) is still stable because chlorine is an electronegativity atom which sticking to a negatively charged aluminium. Hence, that product is possible.
No, to become stable an element, whether it's a metal or a non-metal has to complete it's octet or duplet. Aluminium must have 8 es in its valence shell to become stable. A metal isn't stable when +ive. It's stable only when it's valence shell is full. Hope you got it.😊
Trust me, imma pharmacy student and if you’ll be attending any field related to ochem or chemistry in general you better have a good background to it, it’ll saveee you tonsssss of time and effort man, you won’t be remembering everything you’ve watched or lowkey studied but once you start studying them it’ll be smoother since your mind came across it before, I never studied chemistry properly in school and I used to always neglect it, i faced and am still facing a really hard time with it now, keep your brains locked onto chemistry man trust mee please it’s not easy and the more you know about it the easier it’ll get on you when it’s a duty to study
Trust me, imma pharmacy student and if you’ll be attending any field related to ochem or chemistry in general you better have a good background to it, it’ll saveee you tonsssss of time and effort man, you won’t be remembering everything you’ve watched or lowkey studied but once you start studying them it’ll be smoother since your mind came across it before, I never studied chemistry properly in school and I used to always neglect it, i faced and am still facing a really hard time with it now, keep your brains locked onto chemistry man trust mee please it’s not easy and the more you know about it the easier it’ll get on you when it’s a duty to study
Hey you better watch out for the fine bros suing for all these reaction videos bro
Thanks for these videos! I have recapped and learned even more than when I was an undergraduate. Cant wait for amino acids, titrations, and spectroscopy!! please hurry!!
Khan Academy is the best fr, there's tons of videos like these in youtube. This is the only one I understood fr.
You explain things so well. thanks so much
Good video, but would have been more useful with the formation of the electrophile included in the mechanism.
thank you so much you realy helped me :)
thnx Khan academy always helpful
Great basic explanation!
Thank you sir!
Good Lecture.
Thanks....
Thank you! Such an easy-to-follow explanation as always!~
I swrr😀💯💯
you are the best
thankyou so much!
thank you sir
Oh my god🤯
First one to comment......gr8 vid. Explained really well. :D
great!!!!!!
why is it that in F.C acylations the catalyst, like Al Cl3 is almost always used in a stoichiometric ratio with the reactants ? if it is truly just a catalyst, and is regenerated, why is this always done ? I have seen text's alluding to the idea that the catalyst is actually complexed with the reaction product, and in fact the final reaction product is only recovered when water is added to hydrolyse the complex...if this is true, then strictly speaking, the lewis acid is not a true catalyst, but more a of a co reactant...right ?...because if water is needed to free the product , it would destroy the lewis acid anyway !
Sound is too low.
can you use an alkeal bromide instead?
yes
MY previous question is:
Why it became AlCl4- in 1st step. Al is electropositive instead could give e- to become AlCl2+ as metals can be stabilized by positive charge and halogens by negative charge...Also Al is big so +ive charge coulld be stabilized..
Please help?? No one tells the reason for 1st step..
hi, I believe it's because Cl itself is located further to the right of the periodic table than Al, this causes Cl to be way more electronegative than Al, all 3 Cl bonded with Al are slightly negatively charged and pulls the electron from the Al, making it slightly positively charged. And since the covalent bonding shares a total of 6 electrons on AlCl3, it needs to ACCEPT electrons to reach the 8 number rather than LOSING the electrons. Hope you get what I mean and if I am wrong please do correct me. Fellow A-level student here.
I don't know the exact reason. But i think, Aluminium has flexible d orbitals so it can gain electrons and still be stable moreover,that product ie. (Alcl4-) is still stable because chlorine is an electronegativity atom which sticking to a negatively charged aluminium. Hence, that product is possible.
No, to become stable an element, whether it's a metal or a non-metal has to complete it's octet or duplet. Aluminium must have 8 es in its valence shell to become stable. A metal isn't stable when +ive. It's stable only when it's valence shell is full. Hope you got it.😊
Vsjgsiavso finally I found someone who explained it!!
Is FC only used for benzene rings?
mostly for aromatic compounds
Why we use AlCl3 and not Fecl3
+Musarat Hussain I feel like its an "either or" situation. You could probably use FeCl3 also.
Explained well, but the video includes too many shortcuts "to save time" IMO.
Isn't it that e- that moves not H
Friedel Crafts in practice:
ua-cam.com/video/KQZYMfP1IcQ/v-deo.html
Too fast man
idek why im watching this i don't start ochem for another 4 years
Trust me, imma pharmacy student and if you’ll be attending any field related to ochem or chemistry in general you better have a good background to it, it’ll saveee you tonsssss of time and effort man, you won’t be remembering everything you’ve watched or lowkey studied but once you start studying them it’ll be smoother since your mind came across it before, I never studied chemistry properly in school and I used to always neglect it, i faced and am still facing a really hard time with it now, keep your brains locked onto chemistry man trust mee please it’s not easy and the more you know about it the easier it’ll get on you when it’s a duty to study
Trust me, imma pharmacy student and if you’ll be attending any field related to ochem or chemistry in general you better have a good background to it, it’ll saveee you tonsssss of time and effort man, you won’t be remembering everything you’ve watched or lowkey studied but once you start studying them it’ll be smoother since your mind came across it before, I never studied chemistry properly in school and I used to always neglect it, i faced and am still facing a really hard time with it now, keep your brains locked onto chemistry man trust mee please it’s not easy and the more you know about it the easier it’ll get on you when it’s a duty to study
@@ahmedassadi9227 it's good to hear the view and experience from a current stem student. i'll take your advice to heart. thank you!
Thanks a lot!!
thanks bro