I am a student living in Malawi (country in central Africa) and i wanted to thank you very much for your videos! keep up the great work. I would immensely appreciate it if you could post more unit 5 chemistry. Thanks again for your help over the years!
+Matteo Bizzaro Thank you for watching! My school has links with an orphanage in Malawi and goes every 2 years. I just uploaded a video on entropy today!
The Oxygen is very electronegative meaning, it's attraction to the electrons is so strong that the nucleus of the Hydrogen is exposed more to the EM waves. So it will cause a peak further the left ( Larger PPM value, down shift). The OH group produces a singlet because the H is bonded to the oxygen which is not bonded to any other hydrogen atoms, so in this case n is equal to 0. By following the rule of N+1, you will get a singlet obviously due to 0+1=1. Reference to 14:50 .
Nice word examiners like is deprotonated; "the oxygen is highly electronegative so it will deprotonate the hydrogen causing the H to shift to the left"
Thanks so much for this video this topic has had me confused for so long because I understood the concepts but not the interpretation. I'm glad you went through the AQA questions it helped a lot.
Thank you so so so so so much for this , I don't think you can begin to understand how muchbyouvhave helped me you have given me confidence in chemistry & you make everything seem so easy! In my exams all I hear is your voice! would love some more videos if you could but underand if you're busy! Your pupils are very lucky kids
Haha! Plan is to get a few more done. Buffers went up earlier on and I'm thinking about doing one more this weekend. Then I'll get a couple more done in preparation for CHEM5!
Thank you so much, your videos have helped me understand A2 chemistry so much. If only I used your videos for AS chemistry :( Could you please make videos rest of the A2 unit 4 chapters because I see you've missed some chapters out and your videos really help a lot!
Hello I just wanted to ask about the last question it got me confused how all the peaks are singlet yet you drew the carbon with 2 hydrogen as it integration with the the carbon and 2 methyl groups since it longer makes it a singlet as the neighboring hydrogen add up it would be really helpful of you replied ASAP and thanks
I am in love with the shape of youR CHEMISTRY 😂😂😂😂 Thank you so much for making this video. I always found this topic really confusing but this video is actually a lifesaver 👌🏻😍 Can you please make a video on chromatography?
question 7c makes sense, but i got a different answer. For instance, I got ethyl ethanoate for E. Even though one side has a singlet (like you said), the other side has the quartet on mine. Can that be an answer? Please reply.
Hello, such a nice explanation, loved it! But I was just wondering if it is an a 2 topic, I study AS currently, but there's somehow nothing about splitting patterns in my textbook
Acee Glob Yes this is an A2 topic for AQA chemistry. I suggest you check the course specification which outlines what topics are AS and what topics are A2 only. Hope this helps!
On an exam question if it asks something like: what does the splitting pattern at 3.2 tell you about this hydrogen?, how would you explain the answer? Like I get why in my head but what would be the best way to explain it on paper?
rojafx "peak at 3.2 is a [ quartet ], so there are [ 3 ] hydrogens on neighboring carbon atoms." If it's a longer question I would probably mention "because of the the n+1 rule" as well. The best way to be sure is to do some past questions and just see what the most common phrasing is on the mark schemes :)
E Rintoul No problem, I've been doing a lot of these questions lately and one little change I want to make to that first answer I gave, is it seems to be better to say " *due to* 3 neighboring hydrogens" rather than "so there are 3 neighboring Hydrogens". It's a small thing but the mark schemes seem to be picky about how splitting is the result of the number of hydrogens rather than the other way around.
at 32:38, I think its an ester instead because of the 2.6 being too high for a ch2 group. Instead it should be the other side of the ester group. I'm down to bre proven wrong ;)
There was another question I was doing which asks: What does the integration trace tell you about the hydrogen atom with a chemical shift of 2.4? what would the ideal answer be for something like this
rojafx The integration trace gives the ratio of the hydrogens in their respective environments. If you have a molecular formula, you can easily work out how many actual hydrogens would be in each environment. I think I would need to see the question to have a better idea of what was being asked... failing that, could you give some more details?
Please make me understand •hiw you drew the structure for part 3 in last question. •I'm also unable to get whether you add hydrogen to R or directly to carbon.
+Zehra Abid You need to use the information from the figures given as well as the data sheet in order to get a full idea of that particular fragment. I don't understand your other question about hydrogen being attached to R or carbon - it really depends on the situation!
in the last example it is said in the question that there are 4 singlet peaks, with regards to the last column at chemical shift 3.8 im assuming its referring to the H in the OH grp. now in the molecule the C that is attached to the OH is also adjacent to 3C with a total of 8H. im not understanding then how it is a singlet and not a 9-peak
wait actually i understand now lol nevermind. i think the carbon you're on about has two proton enviroments. one on the oxygen and one on the 2 CH3s as they are the same . the hydrogen on the oxygen is a singlet as the oxygen is blocking it from other hydrogens and and the hydrogens on the CH3s count as singlets as the carbons are blocking them from other hydrogens. ur probably not even doing a levels anymore tho lol
btw i foudn this for a mark scheme point on a 5 marker fro why TMS, CCL4 and CDCL3 are being used. CCl4 non polar (- good solvent for non-polar organic molecules) 2c CDCl3 polar covalent molecule (- good solvent for polar organic compounds) at 5:24
crying over the last episode because of this scene in season three is the worst part about it and i love that show but it makes my stomach ache so hard for me to process the ending of season three
excellent video quick question for the last question you started off with 2 hydrogens for the first part of the quistion and then on the second part you put it up to three, can u explain this please
+Ashley Jenner I don't know where you're on about... If it is the structure for E then it is methyl propanoate. The part that contains the carbonyl group has the -oate part of the name and the one that has its carbon chain directly joined to the O is the -yl part.
five years later, he's still saving lives
6
Amen to that
@@rulandfurqan4616 7
@@nadahosny3595 8
even 8 years later haha
10 years later, he’s still saving lives
I will only die in peace after I have had a firm "thank you" handshake with you sir.
Paper 2 tomorrow and I'm still learning 😭
bro fr😭
Me too😖
Sitting 2024 June paper
king of last minute revision
Thanks for these videos, the aqa textbook is cancer, they couldn't explain why 1+1=2
LMAO
There’s SOOOO many mistakes how are they supposed to teach me chem when they clearly don’t even know it themselves sksksk
[Timestamps]
1:47 - The TMS Standard (recap)
5:02 - Solvents used (CDCl3 and CCl4)
7:02 - Interpreting Proton NMR Spectra (basic peaks)
11:16 - Splitting Patterns (& the n+1 rule)
16:23 - Integration traces
20:05 - Past Paper Questions [Q1 @ 20:17; Q2 @ 21:58; Q3 @ 26:45]
thank youuuu
LAST MINUTE REVISION thanks Elliot
Me too! 😂😭
All hail the Chem-Lord
8 yrs later he is STILL saving lives
pretty sure we at a decade now
@@veleox5442ur fun at parties🎉
I am a student living in Malawi (country in central Africa) and i wanted to thank you very much for your videos! keep up the great work. I would immensely appreciate it if you could post more unit 5 chemistry. Thanks again for your help over the years!
+Matteo Bizzaro Thank you for watching! My school has links with an orphanage in Malawi and goes every 2 years. I just uploaded a video on entropy today!
I would never spend thirty minutes straight on youtube for something educational.. But this one.. Amazes me.. You taught us so clearly! Thank you!
I am so glad I found this channel. Thank you so much! Absolute lifesaver.
You are such a top geezer!! So much respect, big up Rintoul
The Oxygen is very electronegative meaning, it's attraction to the electrons is so strong that the nucleus of the Hydrogen is exposed more to the EM waves. So it will cause a peak further the left ( Larger PPM value, down shift). The OH group produces a singlet because the H is bonded to the oxygen which is not bonded to any other hydrogen atoms, so in this case n is equal to 0. By following the rule of N+1, you will get a singlet obviously due to 0+1=1. Reference to 14:50 .
Nice word examiners like is deprotonated; "the oxygen is highly electronegative so it will deprotonate the hydrogen causing the H to shift to the left"
AKA I have no idea what this means and I’m gonna fail
Chris Robinson my exam is today I can’t 😂😂😂
Thanks so much for this video this topic has had me confused for so long because I understood the concepts but not the interpretation. I'm glad you went through the AQA questions it helped a lot.
MrMinerUK No probem!
For the love of god, please make more A2 videos :)
+U Mad I shall be making more! Think I'm going to go over and redo all videos too to make them shorter and more manageable...
E Rintoul thanks E-dawg
***** Oof. That's a solid name. I hope it catches on.
E Rintoul hi the question at 21.27 should have 5 peaks right due to the central carbon which is 2nd from the left.
@@kilkure it's proton NMR tho, only H environments are relevant
Thank you for these amazing videos again! They are incredibly helpful. :)
I was literally crying because I couldn't understand but watching this video really made my day.
“We don’t want to be dying when we use it” 👌🏾😂😂
These are the very best videos on NMR 😊
Life saver, sir. Thank you
Aced my Chem 2 retake :D, thank you for the vids it helped me recap, and cheers for taking the time to do more for Chem 4 much appreciated.
No problem!
I know this is an old video but genuinley mate, thank you so much
Thank you so so so so so much for this , I don't think you can begin to understand how muchbyouvhave helped me you have given me confidence in chemistry & you make everything seem so easy! In my exams all I hear is your voice! would love some more videos if you could but underand if you're busy! Your pupils are very lucky kids
Haha! Plan is to get a few more done. Buffers went up earlier on and I'm thinking about doing one more this weekend. Then I'll get a couple more done in preparation for CHEM5!
'TMS is inert and toxic. Why would you use it...'
" Because it is inert and toxic..." 🤣🤣
I actually love you like omg you've saved me
+geegeob98 Wow. Big.
Excellent! Been Tryna find a NMR Video that i actually understand..Didnt get it all But Overall superb Job, Keep it up Mate, Very Helpful!
+UBQ Xi I'm glad you are almost there! What in particular did you not get and I'll try get you to 100%.
Blessed to watch this video.
You sir are a legend! Very well explained. Finally get this shit!
Quite a tricky topic - thanks for your explanations.
Absolutely amazing❤
Another excellent video, mate! Please do some more a2 past papers chemistry god!
Lololol shut the hell up shiv
+Shazzkid it was an innocent request
+Shiv Kumar didn't say it wasnt Mr. Kumar
This helped me so much thank you for saving my grade - can you please do a walk through of more a2 organic papers ?
You’re an absolute unit
Bow to the chemistry king
So useful! Thanks so much!
Thank you. ffs I wish I found these videos the day before my exam
6 years later 11 pm my man is saving me
Thank you so much this really helped me!
Does this playlist cover whole Aslevel chemistry organic
Thank you so much, your videos have helped me understand A2 chemistry so much. If only I used your videos for AS chemistry :( Could you please make videos rest of the A2 unit 4 chapters because I see you've missed some chapters out and your videos really help a lot!
+Rezwana Begum I certainly shall do. The plan is to get Unit 5 done too.
Thank you for your video. I have a little question at 21:19, why don't you consider the diastereotopic hydrogen atom in CH2?
You're a legend thank u
Thanks, this helped a lot.
Hi would it be okay if you made some videos on transition metals?
Never knew you were supposed to read the fragment on the datasheet from the Hydrogen in bold. thanks
excellent!
Thank you sir for these awesome videos. You have helped out a shit tonne of us twats.
How does being volatile make tetramethylsilane suitable for proton NMR?
Woaaahh......that last question was tougghh!! But I think i'm getting there :) :)
You’re our saviour.
Hello I just wanted to ask about the last question it got me confused how all the peaks are singlet yet you drew the carbon with 2 hydrogen as it integration with the the carbon and 2 methyl groups since it longer makes it a singlet as the neighboring hydrogen add up it would be really helpful of you replied ASAP and thanks
AQA man why did they feel the need to put NMR on the spec it takes the ultimate piss 😭
'we don't wanna be dying when we use it' wordddd
At 19:50 why does the OH not produce a singlet splitting pattern?
I am in love with the shape of youR CHEMISTRY 😂😂😂😂 Thank you so much for making this video. I always found this topic really confusing but this video is actually a lifesaver 👌🏻😍 Can you please make a video on chromatography?
question 7c makes sense, but i got a different answer. For instance, I got ethyl ethanoate for E. Even though one side has a singlet (like you said), the other side has the quartet on mine. Can that be an answer? Please reply.
Thank you :3
TYSM!!!
hello,
thanks for this video. I'm doing the wjec spec, and the data sheet gives ppm values for 'R-CH3' and '-CH3'. What's the difference??!!!
***** That's weird... I honestly don't know!
Hello, such a nice explanation, loved it! But I was just wondering if it is an a 2 topic, I study AS currently, but there's somehow nothing about splitting patterns in my textbook
Acee Glob Yes this is an A2 topic for AQA chemistry. I suggest you check the course specification which outlines what topics are AS and what topics are A2 only. Hope this helps!
plz do more a2 chem videos
+kevin philip OK.
7 years later ...
At 24:30 how did u know to add an o and ch3
So essentially the integrator trace is the ratio of Hydrogens present?
cheeeers e dawg ;)
What tablet / touch screen laptop / writing pad ( Xp-Pen or Wacom) ? and stlyer do you use?
ily
Thks
24:33 confused... why did u add the methyl group on the oxygen?
33:00 I got H3C-C(O)-CH2-O-CH(CH3)2
Is that wrong? And why?
On an exam question if it asks something like: what does the splitting pattern at 3.2 tell you about this hydrogen?, how would you explain the answer? Like I get why in my head but what would be the best way to explain it on paper?
rojafx "peak at 3.2 is a [ quartet ], so there are [ 3 ] hydrogens on neighboring carbon atoms."
If it's a longer question I would probably mention "because of the the n+1 rule" as well. The best way to be sure is to do some past questions and just see what the most common phrasing is on the mark schemes :)
rojafx I would say exactly as TheRABIDdude said!
TheRABIDdude Good reply - thanks!
E Rintoul No problem, I've been doing a lot of these questions lately and one little change I want to make to that first answer I gave, is it seems to be better to say " *due to* 3 neighboring hydrogens" rather than "so there are 3 neighboring Hydrogens". It's a small thing but the mark schemes seem to be picky about how splitting is the result of the number of hydrogens rather than the other way around.
TheRABIDdude Ah yeah, I can see now how the due makes the answer that bit better. Good work on correcting it and being so proactive!
at 32:38, I think its an ester instead because of the 2.6 being too high for a ch2 group. Instead it should be the other side of the ester group. I'm down to bre proven wrong ;)
There was another question I was doing which asks: What does the integration trace tell you about the hydrogen atom with a chemical shift of 2.4? what would the ideal answer be for something like this
rojafx The integration trace gives the ratio of the hydrogens in their respective environments. If you have a molecular formula, you can easily work out how many actual hydrogens would be in each environment. I think I would need to see the question to have a better idea of what was being asked... failing that, could you give some more details?
E Rintoul nahh its fine just do some chem 4 video walkthroughs and i'll be fine ur vids are amazing keep it up ;)
E Rintoul nahh its fine just do some chem 4 video walkthroughs and i'll be fine ur vids are amazing keep it up ;)
Please make me understand •hiw you drew the structure for part 3 in last question. •I'm also unable to get whether you add hydrogen to R or directly to carbon.
+Zehra Abid You need to use the information from the figures given as well as the data sheet in order to get a full idea of that particular fragment. I don't understand your other question about hydrogen being attached to R or carbon - it really depends on the situation!
what about the 25 mark questions?
+matthew ryder What about them...? You doing AQA?
in the last example it is said in the question that there are 4 singlet peaks, with regards to the last column at chemical shift 3.8 im assuming its referring to the H in the OH grp. now in the molecule the C that is attached to the OH is also adjacent to 3C with a total of 8H. im not understanding then how it is a singlet and not a 9-peak
i know u said this 11 months ago but i have the exact same question im so confused 😭
wait actually i understand now lol nevermind. i think the carbon you're on about has two proton enviroments. one on the oxygen and one on the 2 CH3s as they are the same . the hydrogen on the oxygen is a singlet as the oxygen is blocking it from other hydrogens and and the hydrogens on the CH3s count as singlets as the carbons are blocking them from other hydrogens. ur probably not even doing a levels anymore tho lol
So we dont die when we use it... Got it Sir :)
btw i foudn this for a mark scheme point on a 5 marker fro why TMS, CCL4 and CDCL3 are being used. CCl4 non polar (- good solvent for non-polar organic molecules)
2c CDCl3 polar covalent molecule (- good solvent for polar organic
compounds) at 5:24
Not aqa, but I've got my A levels in about two weeks and I'm still confused about this shit
Can D20 be used instead of CDCl3
the molecule cant form hydrogen bonds so no
crying over the last episode because of this scene in season three is the worst part about it and i love that show but it makes my stomach ache so hard for me to process the ending of season three
How many videos could you squeze in for unit 4 and 5 before our exams?
Not sure. Certainly a couple more CHEM4. There any topics you want?
If you could do acids and bases that'll be cool specifically buffer calculations and how they work
abdurahman ali arggghhhh i hate buffer calculations -_-
S.A Riaz abdurahman ali Buffers is done...
AQA A2 Chemistry - Buffers
1 mark for deducing the stucture is pathetic :( I was fiddling for 5-10mins trying to get the pieces to fit together. Great video though!
he finds your voice attractive. he's called pattricia
Anyone? could it also be TMS???? at 20:34
@@2000Tubetastic Cheers a lot
13:00 where it’s about to click in my head
Me watching this during uni
Yo who's watching on the same day.
every time he says 'TMS' I now hear 'tier mess' lol
OCR
excellent video quick question for the last question you started off with 2 hydrogens for the first part of the quistion and then on the second part you put it up to three, can u explain this please
Can you tell me which question, please? Link to the time if you can.
yeah its 30:43question ii I just don't understand why in question i you started of with 2 hydrogens and then went up to three in question ii.
Isn't that propanyl methanoate not methyl propanoate? I'm confused
+Ashley Jenner I don't know where you're on about... If it is the structure for E then it is methyl propanoate. The part that contains the carbonyl group has the -oate part of the name and the one that has its carbon chain directly joined to the O is the -yl part.
sorry mate my teacher is saying you seem confused regarding the integration😂😂😂
thanks e liot lmao
Change your name to ChemGod.
bro you are not from this world.
10 years later, he's still saving lives