How to read IR spectroscopy - Organic Chemistry Tutorials

[hockeystick98]

when you have the ester and aldehyde stretches, how do u no where they go in the molecule? or r they just placed wherever?

[Sarutahiko1]

@hockeystick98 generally speaking you do not get TOO much information about the molecule from IR. NMR is used for that. You can get it if you really study IR a lot, but in general NMR is used to give the structure of the molecule, IR just tells you what functional groups are present, not where they are in the molecule

[xiaoyangzou]

Thank you for this video so much! I was struggling with spectroscopy and found your video very helpful. Its people like you that make youtube such a great place :) Keep up the good work!

[xVaniIIa]

Thank you so much! The picture with the peaks in relative locations was very useful. IR spectroscopy is very clear now, and with practice, I'll be able to master this skill. :)

[wolkenwindgefluester]

great video! helped me a lot. thank you so much =)

[knmhb222]

hey what software and mic do you use to record your videos? great videos btw!

[nittro]

uh, took some time to figure out that the wawenumber scale in some cases is different above 2000 cm-1, that makes the shape of the peaks somewhat narrower. Just a mental note.

[TheSmita1990]

ur the best....thank u!!

[sushilangelo]

it would be better if you go on pointing at the peaks your are talking about

..just a suggestion...

[natvialatte]

This was amaaaaazingly helpful. You're awesome, thanks

[kanz3nping]

talk too fast. i cant catch up. :(

[Sarutahiko1]

@kanz3nping

hey! thanks for watching my IR video. Sorry its too fast. Did you try listening to a little bit at a time, then pausing and thinking it out, then watching more?

Best,

Saru

[TheSmita1990]

@Sarutahiko1 ur the best....thank u!!

[imamnalog]

9:34 That amid has two peaks around 3400 and 3200. Is it possible that this peak at around 3200 is not from an actual amide but from auto associate? I know it happens in concentrations greater than 3 x 10^ -3 mol / l so i was also wondering what was its concentration and is spectrum collected from liquid or solid sample?

[Sarutahiko1]

@imamnalog google AIST organic chemistry database and google the chemical formula shown. there you can see solid state vs liquid, etc..

[willchoumusic]

Can you explain more clearly why jaggedy edgs left of 3000 peak show that there are c=c bonds aka unsaturated????

[Sarutahiko1]

@willchoumusic sure!!

Does this table help?

try the link at

chem.ucla.edu/~webspectra/irta­ble.html

[fhl1]

2:02 gas moment! xD

[Ellieckay]

Thank you so much!! I was so lost in lab and had a quiz grade riding on my capabilities of identifying these groups!!! Excellent video and will watch your others...hope you'll post more! ; ) def added to favorites...

[KeptNow]

oh and please consider teaching as a profession, if you havent already.!

[Sarutahiko1]

@KeptNow thanks

[KeptNow]

THANK YOU SO EFFIN MUCH :D

[Sarutahiko1]

@KeptNow youre welcome dude

[TwilightRaid]

so is this vidoe aimed at a university level or high school

[WowhesNeat]

That was very helpful thx!

[marfay61]

Def helpful, a lot better than my prof!

[timextoxlive]

"I endeavor to give you novel arguments regarding abstruse topics"

awesome.

[malaikaswm]

two thumbs up!

[byQuake]

have an exam tomorrow. looking for all the videos that may help.

one of my favorites. thank you sir

[janitarjanitar]

quantity AND quality. very rare in a teacher. thanks for your dedication!

[chickenpoppp]

thanks dude!! very helpful!

[mthoang10]

Great video.

But I think it'd have been more helpful if you talked slower and used pointer because before I figure out what peak you are talking about, you move to the next one already :(, and this is not the information that one can digest fast.

Subscribed

[Ishy617]

Thanks a lot for your videos but I wish if you didn't speak so FAST! I'm kinda new to this and I have to stop the vid every few seconds to take notes and look for the unclear peak numbers that you say so fast!!!!

[giulianavo]

great vid!! really makes ir easy to understand!

[Sarutahiko1]

@giulianavo thanks for the nice comment.. im glad the video helped :-)

[StudMuffinJohnny]

@Sarutahiko1 Hey Thanks! this was awesome! But quick question; Im having difficulty analysing the IR spectrum for Methyl Ethyl Ketone (I know its simple but I cant get it!); could you give me like a really really really detailed solution? I have to know this! Thanks :)!

[deelyee5]

u r awesome!

[aidinporras]

thank you so much!!

[RareEmerauld86]

LOVE this video on how to read IR!!! Thanks so much for teaching and uploading this vid!!!

[Sarutahiko1]

@RareEmerauld86 Thank you very much for this nice comment. Having this kind of feedback makes me want to make even more videos.

Best,

Saru

[RareEmerauld86]

@Sarutahiko1 No problem! You made me pass my lab theory test, man!

[Sarutahiko1]

@RareEmerauld86 Oh ya!!

[ruiteog]

PRETTY GOOD but the scale is hard to make out!!