For the millionth time, I can't thank you enough, yoU AMAZING HUMAN BEING. You have saved me countless number of times when I was on the verge of giving up and failing. I CAN'T EXPRESS MY GRATITUDE. I HAVEN'T EVEN STARTED THE BLOODY VIDEO AND I AM ALREADY SO HAPPY THAT THIS IS ON HERE. ANALYTICAL DOESN'T MAKE ANY SENSE AT ALL
Your an absolute Legend. Thank you so much. Just watched the proton NMR and that video was amazing. It's pretty neat that you include hard exam questions at the end, it shows you how these topics are phrased in exams. Extra prayers for you man. 🙏🏽🙏🏽🙏🏽
I'm studying Unit 4 for my mocks and I find this so difficult to get to grips with. Lovee your style of writing and you explain it so clearly. Thank you and I hope you will make more A2 videos!
@@pyroflame5414 nope i just checked and hes corrects its 5 but hes not smart enough to realise that most people would view it as 4 and explain why it isnt 4
@@pyroflame5414 after research ive learnt that the structural formula of the species attached must be the same so for the two nitro groups ontop the carbons have the same distance from methyl but the bottom carbon doesnt
I don't understand why TNT has 5 peaks, the bottom carbon is bonded to 2 carbons and a nitrogen as well so i though it should be in the same peak with the other 2.
I am a bit confused about 21:45 - isn't what you have drawn 2-methylethyl propanoate (seeing as the methyl group is coming off the 2nd carbon from the right end)? Surely 1-methylethyl propanoate doesn't exist considering that a methyl group coming off the 1st carbon is basically same as calling it proply propanoate?
I was taught that no matter what chemical you are dealing with, always count the chain from the end. 1-methyl ethyl propanoate is just propyl propanoate. He drew 2-methyl ethyl propanoate in the video.
These videos are sooo helpful! thank you! As far as revision goes, what techniques would you suggest to make sure you're getting high marks once you've learned the content? Thanks again!
Aisha Bashir Once you know that you have learnt all the content, that's when I would suggest that you hammer the questions. Really look at how you are answering questions and mark them! That way you can see where you are losing marks and tweak the way that you write your answers.
in 28:35 , aren't the four carbons that are attached to another carbon and a hydrogen in benzene ring, in the SAME environment? Same question for 27:11 ; aren't the 3 carbons attached to NO2, in the same environment? cause they're attached to same elements? Looking forward to a decent reply and thanks
@F Ar In the benzene part of atenolol, the first carbon the one bonded to the CH2 cannot be found elsewhere on the benzene ring. The next two, clockwise and anticlockwise carbons are the same because of the symmetry and so are the next two carbons clockwise and anticlockwise because of the symmetry. The last carbon is bonded to the O and so is unique like the first carbon was. Hope this helps
In the last molecule (the long one at 27:44), why are there 4 groups in the benzene ring? There is a group each on the far left and right sides, but wouldn’t the top left, top right, bottom left and bottom right all be apart as one group since they are all attached to the same type of atom/group? Sorry if I explained that badly.
Just slightly confused about the 1-methylethylpropanoate - I thought there were only 4 peaks as the first CH3 of the "propan" part is identical to the last two CH3 groups of the methyl and ethyl. So aren't all the CH3 groups in the same environment and they all count as one peak??
Hey, I havent started A2 yet and im doing some early revision (i got an A at AS thanks to your vids :) ) so my knowledge on this isnt great so excuse me. But, at 27:23 there are 3 carbons that are attached to an NO2 group so wouldnt that be 1 carbon environment for all 3 of them? Or are they different environments because the two carbons at the top of the molecule (the ones that are attached to NO2) are attached to a carbon which is also attached to a methyl group?
+Ayy Apologies for my late reply - I never saw your comment! First off, well done on getting the A at AS - but it was down to you not me! The carbon environment depends on exactly what is attached to it and the order that they are attached. Both the carbons attached directly to the NO2 groups have the same things attached to them if you look around the ring. However, the carbon attached directly to the methyl group is different from both of them - for a start it is directly attached to the methyl group and this is something that is not true of the other carbons that we are discussing. Does that make sense?
I've 2 questions I'm confused about. Firstly, what's this chemical shift? Is it the range of magnetic field applied or the frequency range of radio waves? Secondly, isn't this flipping due to the frequency of radio waves provided? Then why are you saying , as well it's written in book, that the magnetic field causes it to flip. My teacher told me the frequency that provides a value equal to delta e that's the difference between 2 energy levels of nucleus caused it to flip. Please please help me!!!
+Zehra Abid chemical shift is relative to TMS. Tms is assigned a value of zero and the rest of the compounds are like caliberated with respect to it;different chemical shift is actually Radio Frequency absorbed by varying states of H protons(chemical environment) so they all absorb varying energy which more or less lies in RF spectrum... so i guess ur right
+Zehra Abid I don't have enough knowledge of NMR to answer your questions fully, I'm afraid. To get a real insight you would need to look at some degree-level books or talk to a university lecturer. I don't think I said that the magnetic field causes it to flip... the magnetic field causes alignment and the radio waves cause the flip.
i hate science since it seems like no one on earth can teach it properly . he keeps saying bond bonds bonds do any other carbons have the same bonds 22:00 when he should be saying do any other carbons have the same SPECIES attached there are clearly other carbons with the same bonds . im tired of studying when textbooks have countless contradictions error and omissions of information and waffling plus even on youtube im receiving the same kind of confusion
[Timestamps]
0:41 - Introduction to NMR Spectroscopy (+brief overview of how it works)
5:42 - Example of a C-13 spectrum
7:20 - The TMS standard
10:22 - Solvent used CDCl3
12:05 - Identifying carbon environments
20:29 - Examples: [21:18 = 1-methylethyl propanoate; 23:42 = but-3-en-2-one; 26:06 = TNT; 27:41 = atenolol]
29:40 - Drawing compounds from C-13 NMR Data (Exam Question)
For the millionth time, I can't thank you enough, yoU AMAZING HUMAN BEING. You have saved me countless number of times when I was on the verge of giving up and failing. I CAN'T EXPRESS MY GRATITUDE. I HAVEN'T EVEN STARTED THE BLOODY VIDEO AND I AM ALREADY SO HAPPY THAT THIS IS ON HERE. ANALYTICAL DOESN'T MAKE ANY SENSE AT ALL
LOOOL my exam is today and im still learning content
neeshizzle sizzle were in this together fam
Nvthaniel you know it😫
Did you pass?
did u pass bro?
bro u pass?
Your an absolute Legend. Thank you so much. Just watched the proton NMR and that video was amazing. It's pretty neat that you include hard exam questions at the end, it shows you how these topics are phrased in exams. Extra prayers for you man. 🙏🏽🙏🏽🙏🏽
MY GOAT. I hope you are Well Sir Erintoul. I and so many others say Thanks. Keep smiling.
Brilliant video, shed light on this topic that I had no clue about cheers!
kingbaldy100 Glad to have helped!
E rintoul "You dont need to know this"
*SKIIIIIIIIIIPPP!!!!!!!*
I'm studying Unit 4 for my mocks and I find this so difficult to get to grips with. Lovee your style of writing and you explain it so clearly. Thank you and I hope you will make more A2 videos!
Danya L There are more A2 videos on their way. Thanks for the kind words!
Tera Baap ko bol paisa bharne
what fucking sense does you comment even make?
woahhhh years ago...how r u doing now
sherin_dxx Pretty good thanks ! I’m a working woman now 🤣 watch his videos they acc helped
boss you yeno lad. proper love ye is right you fuckin gem
Tuning your radio “guhhhh”😂 6.41 I will remember that in my exam
Last minute revision I see
Thank you man. Hero.
George Parker No problem!
watch it at speed 1.5 or 2,
Thanks
this is brilliant easy to follow stuff. I was brushing up for an interview thanks
Yeah they are gonna ask you to find the number of protons
Imbecile
@@pratikgpt YOU ARE the imbecile. Idiot.
27:25 would the bottom carbon of the benzene ring not also have the same environment as the other ones bonded to NO2?
yeah I thought it was 4 environments I feel like he might be wrong
and then for the example after is it not 10 environments???
@@tamsindave it has to be wrong im pretty sure its 4 environments he miscounted
@@pyroflame5414 nope i just checked and hes corrects its 5 but hes not smart enough to realise that most people would view it as 4 and explain why it isnt 4
@@pyroflame5414 after research ive learnt that the structural formula of the species attached must be the same so for the two nitro groups ontop the carbons have the same distance from methyl but the bottom carbon doesnt
I don't understand why TNT has 5 peaks, the bottom carbon is bonded to 2 carbons and a nitrogen as well so i though it should be in the same peak with the other 2.
I have fallen in love with your handwriting... honestly it's immaculate!!!
For some reason I only write like that when doing the videos! Ordinarily my writing is quite different!
Is it even better than this #confused
How do you write when doing videos?
WOW Woah I would say it is neater on paper!
I use a Wacom tablet that lets me draw/write directly onto the screen.
Okay cool
fantastic video!, best video explaining NMR!
franco diaz Thanks very much!
These videos help me so much, saved my grades hahaha
Can't thank you enough! I think I've got it! thanks for the tips on the symmetry as well
+Natalie Preston Delightful :)
I am a bit confused about 21:45 - isn't what you have drawn 2-methylethyl propanoate (seeing as the methyl group is coming off the 2nd carbon from the right end)?
Surely 1-methylethyl propanoate doesn't exist considering that a methyl group coming off the 1st carbon is basically same as calling it proply propanoate?
No, you start counting from the O end.
I counted and it's still 2-methyl.
I think making an ESTER from
Reacting ALCOHOL + CARBOXYLIC ACID maybe help u guys 😬
P.s read the ALKYL PART CAREFULLY
I was taught that no matter what chemical you are dealing with, always count the chain from the end. 1-methyl ethyl propanoate is just propyl propanoate. He drew 2-methyl ethyl propanoate in the video.
These videos are sooo helpful! thank you! As far as revision goes, what techniques would you suggest to make sure you're getting high marks once you've learned the content?
Thanks again!
Aisha Bashir Once you know that you have learnt all the content, that's when I would suggest that you hammer the questions. Really look at how you are answering questions and mark them! That way you can see where you are losing marks and tweak the way that you write your answers.
Got paper 2 in the afternoon, cames straight to E Rintoul so he can save my life
Great video! Very informative! :)
at 30:50 . are you sue the molecular formula is C6H4N2O4, it seems that there are more than 4 hydrogens bonded to the carbons
in 28:35 , aren't the four carbons that are attached to another carbon and a hydrogen in benzene ring, in the SAME environment? Same question for 27:11 ; aren't the 3 carbons attached to NO2, in the same environment? cause they're attached to same elements?
Looking forward to a decent reply and thanks
@F Ar In the benzene part of atenolol, the first carbon the one bonded to the CH2 cannot be found elsewhere on the benzene ring. The next two, clockwise and anticlockwise carbons are the same because of the symmetry and so are the next two carbons clockwise and anticlockwise because of the symmetry. The last carbon is bonded to the O and so is unique like the first carbon was. Hope this helps
In the last molecule (the long one at 27:44), why are there 4 groups in the benzene ring? There is a group each on the far left and right sides, but wouldn’t the top left, top right, bottom left and bottom right all be apart as one group since they are all attached to the same type of atom/group? Sorry if I explained that badly.
Just slightly confused about the 1-methylethylpropanoate - I thought there were only 4 peaks as the first CH3 of the "propan" part is identical to the last two CH3 groups of the methyl and ethyl. So aren't all the CH3 groups in the same environment and they all count as one peak??
+Arielle Johnson (Ah-Ree-Elle) Where in the video?
+Arielle Johnson (Ah-Ree-Elle) no because the molecule is not symmetrical
Arielle Johnson same thoughts here
E Rintoul 22:08 would love an explanation too cause I had the same thoughts
@@mounahamid2122 how? The first ch3 has a ch2 attached and the 2 last ch3s have a ch attached so 2 environments.
Hey, I havent started A2 yet and im doing some early revision (i got an A at AS thanks to your vids :) ) so my knowledge on this isnt great so excuse me. But, at 27:23 there are 3 carbons that are attached to an NO2 group so wouldnt that be 1 carbon environment for all 3 of them? Or are they different environments because the two carbons at the top of the molecule (the ones that are attached to NO2) are attached to a carbon which is also attached to a methyl group?
+Joanne Cook ahh i see, thanks very much
+Ayy Apologies for my late reply - I never saw your comment!
First off, well done on getting the A at AS - but it was down to you not me!
The carbon environment depends on exactly what is attached to it and the order that they are attached. Both the carbons attached directly to the NO2 groups have the same things attached to them if you look around the ring. However, the carbon attached directly to the methyl group is different from both of them - for a start it is directly attached to the methyl group and this is something that is not true of the other carbons that we are discussing.
Does that make sense?
+Joanne Cook Can you explain what you mean please, Joanne?
+E Rintoul Yep i understand it now, thank you :)
2024 paper 2 tmrw anyone?
Cmon 💪💪💪💪💪
Cooked
Bless the day I found this video....
in the last example, how does the benzene rings take the 4 hydrogens as well as the 6 carbons
Explain what u mean
U mean the molecular formula ?
wow pretty advanced stuff for high school chemistry!
fucking tell us about it lool
In the aromatic example you gave us, why is the carbon bound to the bottom NO2 in another environment from the 2 at the top of the ring?
I had a go at the last question and I got 1,4 dinitrobenzene for compound G (the one for 2 carbon peaks). would that be right as well? Thank you :)
No. If you count starting from any NO2 group, the fourth C is the one directly opposite. F.
I actually understand 😭😭
can this be used for OCR?
great video btw!
+zannatul Zan I'm not 100% sure (maybe someone else can confirm...) but I would guess at yes...
+E Rintoul I will be able to say tomorrow when i cover this is lesson :)
E Rintoul thanks g
HI are you going to do other videos like on kinetics and other topics in the A2 spec.
sahirakhan12 Yes I am.
you're a God send
hi ,i hv a question plz any one know the real answer tell me , how many peak did peniciline give in spectrum of C13 NMR , its 14 or 13 peaks ?!!???!!
Sangar Sardar What?!
E Rintoul i was want to know how much peak penicilin G give in spectrum of C13
Just randomly?!
i make my exam, no need thanx :P
8 peaks
Will this work for Edexcel IAL ?
just look at the specification and see what will come up for edexcel
whos bricking it?
Thank you for this video! :)
Unit 4 is A2 not AS...
The answer to life. You are correct. A simple mistake. Don't think it will matter too much in the grand scheme of things!
i would appreciate if you could use a better mike.
Really helpful!
the real top g
Has this ever come up on an exam?
No
PEAK HEIGHT NEEDS EXPLAINING
Come again?
@@MrERintoul you did not really emphasize the intensity significance
thank you king
thank u sir very much helpful
Wow bahut helpful
I've 2 questions I'm confused about. Firstly, what's this chemical shift? Is it the range of magnetic field applied or the frequency range of radio waves? Secondly, isn't this flipping due to the frequency of radio waves provided? Then why are you saying , as well it's written in book, that the magnetic field causes it to flip. My teacher told me the frequency that provides a value equal to delta e that's the difference between 2 energy levels of nucleus caused it to flip. Please please help me!!!
+Zehra Abid chemical shift is relative to TMS. Tms is assigned a value of zero and the rest of the compounds are like caliberated with respect to it;different chemical shift is actually Radio Frequency absorbed by varying states of H protons(chemical environment) so they all absorb varying energy which more or less lies in RF spectrum... so i guess ur right
+Zehra Abid I don't have enough knowledge of NMR to answer your questions fully, I'm afraid. To get a real insight you would need to look at some degree-level books or talk to a university lecturer. I don't think I said that the magnetic field causes it to flip... the magnetic field causes alignment and the radio waves cause the flip.
11:07
i hate science since it seems like no one on earth can teach it properly . he keeps saying bond bonds bonds do any other carbons have the same bonds 22:00 when he should be saying do any other carbons have the same SPECIES attached there are clearly other carbons with the same bonds . im tired of studying when textbooks have countless contradictions error and omissions of information and waffling plus even on youtube im receiving the same kind of confusion
G
R
E
A
T
video
😀
NOO AMINA ACIDS IM CRYING OMG WHAT HOW WHEN WHY 😞😩😩😩
Nice
thank youuuu so much haha
Can you do a past paper before wedneday's exam please?
Hasnain Mobeen It's done...
TYSM!!
Does anyone know of a biology teacher who teaches a level biology in a similar fashion to e rintoul???????
biorach has good content explains in very similar concept, not sure has convered all the syllabus like e rintoul
Miss Estruch Biology
Amino** lool
CRASH COURSE