IR Spectroscopy - Practice Problems
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- Опубліковано 29 лип 2020
- This organic chemistry video tutorial on IR spectroscopy provides plenty of practice problems that help you to identify the functional groups that correspond to a particular IR spectrum.
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Thanks for the video. The C=O stretch was a little off on the fourth problem @ 5:46 . I got confused for a moment ;)
Yuh, same
me too! i was like looking for which had a triple bond around 2200
okay good, im not going crazy, I was looking at my notes for like 3 mins like huh, then I settled for trick question, none of the above. and when he said C=O 1700 I instantly came to the comments lolol
@@joshuahering2041 on a real test, the professor would have to give you that one haha. You'd have good reason to pick none of the above; I think he just slipped a little when he was drawing that 1700 stretch.
@@vanessatravieso8775 nerds
Hello,
I’m a Hong Kong student. It is sincerely appreciated that your video no matter is organic chemistry or physics. These videos totally save my college life. There is no words to express how much thankful am I.
Great content, however at 6:10 the signal is between 2000cm^-1 and 3000 cm^-1, you approximated it as 1700cm^-1.
The same mistake was made at 10:02 Great content! This really broke IR spectra interpretation for me.
That was a big error.
It also confused me.
This topic is too sensitive to make such blind mistakes
i was confused as well
At least I know I’m on the right track for noticing it .
I thought I was going insane
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@@b-annm5571 YES I TOTALLY AGREE
Real organic spectro knowledge in simple way
Thanks
For problem #4, can you clarify this. U said the peak was at 1700 however the peak was presented after 2000, roughly 2200. Is this a mistake. This confused me as I see you had the C=O in all the answers but the peak was not presented around 1600
It is a mistake
Yeah it's a mistake
I'm a pharmacy student and there is no words express how much thankful l am , I'm really understand IR spectroscopy 😍
Oh gawd allmaitee, I really needed this 18 months ago. You my dude, I trust your videos the most. It sucks that you didn't have the time to prep this before.
This made the new content we had to learn for Chem A level a lottt more easier! Thanks!!!
Not kidding I was doing my class lectures and text book to try and understand problems like these for 4 hours and was getting no where then I watched your two 10 min videos on IR spectroscopy and understand it. THANK YOU
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I hope you are ok..
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Thank you for this video! I appreciate the breakdown of how to think about IR spectra!
i watched this very carefully and i understand now. thank you for making it easy to follow.
I made a 102% on my 2nd Ochem exam that was majority IR/NMR thanks to you!
mine is in 2 days omg
at 6:20, I see the second curve as 2200 rather than 1700 C=O. Could you explain this? Thank you so much!
Glad i wasn’t the only one at 2200 this would be c triple bond c
Our boy dun bunked the drawing up is what happened. THE FOOL.
you need a new glasses, that's only explanation.
Wow thanks I really needed this, You are great
No one can teach this better than u... literally no one
Incredible explanation! Well done!
you're the best teacher !
You've painted the C=O signal as in it was 2200-2300, not 1700 :(
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It is easier to understand with practice problems, thank you!
Thank you so much for the phenomenal help you have been for me !! I do want to say though, at 6:10 you mentioned the signal at approx 2200 is a C=O stretch, how could this be so or is it that you were accidentally off on the graph? Pls clarify amazing tutor!
It was a slip up
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Thank you 😊
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Thanks for such a helpful video:)
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Nice and informative session..😊 Thank you Sir 🤗💝
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Great content ❤ Thank you so much
Thank you, this really helped I needed this for my test cause i'm in 6th grade. :D
Thanks a lot, you are the best!
Thank you for this valuable video
It's very useful.. thanks . Then in the fourth problem there is no peak like carbonyl but u said like 1700 cm^-1.
Hi I was inspired on how you make your lesson clear and presentable but may I ask what software do you use to illustrate your discussion because I will need it to my online class I hope that you reply to comment thank you.
Hello there!
Wonderful class
But I do have a question.
Please what is the name of that software you are using to write that!...... please
Im always doing that in my notebook thank you you help me
I would like to thank you for making learning enjoyable for me.
we do appreciate.
Thank you
Really it's very helpful
thank you!
hi sir, what online blackboard do you use?
In Problem 4, how can the number after 2000 its about 2200 and you say that it's 1700, there is some thing wrong
i was going to say that i think thats a mistake on his part
What website does he use???
Number four confused me I initially chose A but then I switched to be because it looked more like something was at 1300 than at 1700. I guess spotting errors helps learn too. Maybe that was his goal.
nice explanation sir,tnq
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How do you make these videos? Which app do u use?
My stupid brain understood this .. thank you soooooo much ❤️❤️
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thank you very much
Very helpful 🙂
The ether expansion or concentration could fool the spectroscopy if not calibrate ether before measuring
May I know what app are you using sir?
I did watch the "Introduction Video" but I'm failing to understand how do you know that which stretch is represented a certain functional group?
In 1:37, the option D is in alkyne terminal end, why is the wavenumber not 3100-3200? He said 2200, that’s for an internal alkyne.
Thank admin
Thanks man
Very intersting. How can we can compare two spectrum??????
Very nice videoss sir
this really really helps me to understand tings that is not easy to understand just by reading. I am very grateful. do you feel the same way guys?
very good
yeah my professor doesnt do multiple choice for the test im about to have so hopefully i remember some of this lol.
Please full topics of post pericyclic reactions..
At 9:35 how does answer choice A have an Alkane stretch? Is it because there's a CH2 bond in between the NH2 and Benzene ring?
Oh wait, is it because the Alkane stretch is sp3?
At no. 4, the signal was at >2000
But you said 1700cm^-1
7:17 that C=O stretch isnt at 1700 cm-1??
please make a video about budans theorem
Time signature of signature spectrum is better
IR spectroscopy helps to determine percentage composition how??
Can I know what kind of app you are using so I can use it too? Cause I need it for reporting please reply ༎ຶ‿༎ຶ
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Shouldn't 4 be an aldehyde?
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You are like Master Oogway from Kung Fu Panda as you are Wiser and have a Calm Voice !
OH or NH ?
the goat
7:10 you put the carbonyl stretch at the wrong side of 2000.
but where is the ch2 bend on problem 2??
@6:22 the stretch is of a nitrile functional group not carbonyl
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Who else is having a CAT tomorrow and therefore to get some content here
Wouldn't problem 5 be A because 2 peaks on the amine mean it is a primary amine? and answer D is a secondary amine.
Answer D is primary amine as nitrogen is directly attached to one single carbon and not 2. At first I also thought the same but then after looking at it carefully I realised it just looks so because of the ring it appears as if it's attached to 2 carbon but no just 1. It's been a year though!😂
where were you when my exam was in june👁👄👁
Im confused because my IR chart says an OH bond is between 3200 and 3500. Not at 3000
In my IR chart, we are given three options for OH bonds. When OH is present in an alcohol, phenols (dilute solutions), it is between 3590 and 3650. When OH is present in alcohol, phenols (hydrogen bonded) it is between 3200 and 3550. When OH is present in carboxylic acids (hydrogen bonded), it is between 2500 and 3000.
👍
From the graph that carbonyl is not at 1700 (question 4).
In Q4, the frequency is beyond 2000... should be around 1700
Now build a time machine
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At 7:21 i think it should be 2200 with C triple bond C so none of them are correct
i can not understand anything. i think i have soo big problem on Organic chemistry. ( i watched IR Spectoscopy- basic introduction )
ghonchi monchi