IR Spectroscopy

Well, this is weird. What are all these squiggles? Those peaks represent the wavelengths of infrared light that don't get to the detector, because there's some functional group in the sample absorbing them. Professor Dave busts out some dance moves in this one. Do the symmetric stretch!
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[@ProfessorDaveExplains]

Want more OChem help? Find me on Chemmunity: chemmunity.info/dave

[@rubyherring]

that was insanely well explained. you deserve every single subscriber.

[@Cypher916]

In my intention he deserves ALL the Sub´s...and stupid Prank Channels go crazy with subs...poor humanity. Very good information. I´ve refreshed my English skills , and on top of that, I´m packed with new knowledge. Go on to the next Video on this topic. *btw nice Tattoo *sry for misspelling xD i have to refresh even further ;) have a nice day all :)

[@KNR90]

Depending on where you are Scientists may use the opposite. Here we invert it, instead of dips we use peaks. Otherwise it's the same

[@Kirby444]

The question is, does he deserve tenure? Perhaps!

[@gusrohan9868]

instablaster.

[@rycarious]

I'm a senior in college and I've been watching your videos since sophomore year. You sir are a lifesaver and a gradesaver.

[@litete2512]

I swear one sentence from this man makes me understand the whole topic better than an hour class.

[@junnunahmed3470]

Hands down the easiest to understand IR spectroscopy vid I found on youtube. The explanation is clear and engaging.

[@claremaguire5977]

It's 12:36am and I have my chem final at 9 tomorrow morning and I'd been flipping through my textbook and noticed IR spectroscopy, which I've never seen before, but which definitely will be on the final...so I'd just like to take this time to thank you for saving me about an hour of trying to understand this just from a textbook. Thanks for saving me time and energy!

[@robertflores5520]

did you pass?

[@Amy-se5ld]

Clare Maguire did you pass...

[@claremaguire5977]

update: passed the course with an A+!! (didn't take me 4 months to get the results in though, only just noticed the replies now)

[@Amy-se5ld]

Clare Maguire oh yes!! Congrats!!! Tools my ochem 2 final today!

[@internationalrelations6552]

Give me no

[@omahawarrior4837]

You're truly a professor, IR has never been narrated so well to me

[@Linxsaisai5]

this saved my life, HL chemistry is kicking my butt and this is just what I needed. Everything is so clear when you explain it!!

[@dayahsamad]

lol i've done it for 4 semesters and i can totally relate

[@nnataliered]

IB buddies!

[@vikrampinto]

so smart...and such great hair..

[@rittenbrake1613]

hahahahah great hair !!!

[@MohdAkmalZakiIO]

a professor hair.

[@kaitacon4776]

he's got the hippie hair tho.

[@mrkoala5127]

couldn't have been explained any better. Perfect. Thanks my man! I feel extremely confident with it right now. It's time to look through all your other spectroscopy videos!

[@satishshinde8074]

This video changed my perspective from a neglected chapter in my Remote sensing course to me wanting to pursue a career in it. Thanks a lot!

[@veronicaaguiniga8496]

Just like your other videos, this video is perfect for those who need a deeper explanation on infrared spectroscopy. To be honest I struggle with identifying stretches in an IR spectrum and this video explains that and more. Thank you.

[@mehwhocares2863]

finally , a concise explanation on why graphs show transmission and a reference to the detector - looking for this has been killing me , and yet a 10 minute video explained better than i could find after 20 minutes searching, thanks Professor Dave - you're a real lifesaver !

[@1221-u4m]

Im pretty sure my chem teacher has seen this video cuz he was dancing with his arm like that in class😂

[@ProfessorDaveExplains]

It's the best way to explain it!

[@1221-u4m]

Totally agree :)

[@rajalrajal4944]

😅😅😅

[@gustavocousino8183]

Mine did too 😭

[@jesspalko2622]

Chem Professor here, we all dance like this when we explain IR 😅😅❤️

[@christophschmidt2232]

That witheboard has borne an incredible amount of knowledge... thank you Prof. Dave!

[@timothymilsom1392]

Thank you so much Professor Dave! I read about this in an MCAT prep book... If we ran a spectroscopy of my understanding, it would have demonstrated 0% absorption. After watching your video I have a much better understanding of how this process works! Thank you again!

[@hellbenttrent]

😂

[@SG-ot4uc]

Such a great explanation. Have been struggling to understand spectroscopy and so grateful I see ur channel

[@Justmyopinionlol]

so well explained! These videos are such classics, people have skipped comments for 2 years now but worth updating comments.

[@danaperez7753]

I´m a spanish speaker and I didn't understand this theme before a found this video, now I totally understand everything, what a great video you have made, thanks

[@georgemissailidis3160]

Professor Dave: talks very advanced science Also Professor Dave: *swinging my arms asymmetrically is a very difficult thing to do*

[@nicole6a]

needed this! we're going over NMR next week and i'm trying to get ahead :)

[@samreenaziz8383]

I wish our university professor could explain and made lectures, topics this easy. These videos are really helpful. Thanks to Professor Dave.

[@samvedkulkarni4705]

Really well explained. From very basics and in depth. Got me to study IRs of some simple molecules as phenol and acetone and benzoic acid. Thank you. IR is a really very interesting concept

[@euniquebyrd6542]

Everything becomes so much more clear after watching your videos! Thank you!

[@ugochukwuegwuatu8519]

this man just explained in the first 4 mins what my org chem 2 teacher in university right now couldn't explain in 5 classes.

[@kwadwoappiahdadzie3936]

This is very good It has given me the very basic understanding than what my lecturer did Do it into detail please

[@ditamayo7095]

Your video was so helpful and I love your enthusiasm!

[@MrHughesNZ]

Brilliant prof. dave, you're the man! you should have way more views for this video. i'll be showing it in my lesson later today.

[@prianshumullick9844]

YOU ARE WONDERFUL SIR,YOUR VEDIOS ARE SHORT AND CRISP.IS JUST TAKES FEW MINUITS TO UNDERSTAND THINGS WELL

[@GalaxyDude96]

The first three minutes are an incredible summation of the theoretical principles of IR Spec 😮 I really wish I had known this existed when I was learning about it in class 😂

[@sruthib.5899]

You explain everything so well, thank you!

[@lizaverma9252]

I saw your videos in first time .your video helped me a lot to understand spectroscopy.love from India

[@justahuman6009]

Watching this before our spectroscopy exam, thanks a lot sir .

[@seoheeyoon1135]

thank you so much for posting tutorials like this! I was really confused when reading my textbook but from this short 10 minutes video, I actually understood because your explanation was 🖒🖒🖒🖒🖒🖒🖒🖒🖒🖒🖒

[@marwam4771]

Thank you sir for after 4 years of college I finally understand IR well

[@constantinoalberto7918]

He explains more than my teacher. Keep it up Professor Dave, you ain't just covering the USA, but the entire world.

[@kyraellisedecastro1167]

That was easy to understand! Thank you, Professor Dave!

[@inaallen2243]

A carbonyl group is C double bonded to O right? The functional group you identified on the right of the whiteboard is an sp2 C-H, which has a significantly different frequency (3050-3150) than carbonyl (1620-1680), which your drew in the spectra. I'm a little confused why you drew the carbonyl frequency in the spectra but identified it's functional group as a sp2 C-H instead?

[@ashekai2545]

Ohmygod. I love all these videos. They're weirdly fun and knowledgeable to watch.

[@ProfessorDaveExplains]

i love weird fun!

[@adityashankar5267]

@@ProfessorDaveExplains me 👋👋

[@yolandayang7380]

thank you professor dave

[@Tlocf]

Prof. Dave saves the day once again.

[@vedumale1822]

Hey Dave.... You are really on of the best teachers in the world. And. the work you do is just extraordinary..... You're Great...... Your tutorials are really useful.....

[@ProfessorDaveExplains]

thanks so much! happy to be of help

[@jatin5774]

Your way of explaining things is really good.I enjoy viewing your lectures.

[@jaafarwamwere6282]

You are changing lives!

[@lesliecorners6152]

best explanation so far

[@robertgranger3123]

Hitting it out of the park. Thanks Dr. Dave

[@diegomonteirogomes519]

Great teaching! Thanks from Brazil!

[@microbi.al6]

I am grateful for you Professor Dave

[@heavenonearth1231]

Super...less time consuming.....quick understandable❤❤❤ respecting you master 🙏🏻🙏🏻🙏🏻

[@TheTgranber]

Loved this! Thank you from Finland!

[@rodher6754]

I had never understood IR spectroscopy until now, great Video 💯

[@ambraquinones5801]

I am so thankful to you! We need more professors like you.

[@nickbutts4561]

Holy cow, you explained this so well thank you!

[@ellarose9983]

I don't pay attention in class, I watch ur vids and use them to make sense of everything else, top down. Thank u! Also, are you ENFP? Asking for obvious reasons

[@marycu620]

Thank you! This is perfect, now I am aware of IR Spec and can be prepared for my quiz tomorrow

[@DarthVader-hl8ro]

I love your symmetric and asymmetric motions 😆

[@monicaesthernambo8896]

Thank you so much, congratulations for your great explanation. Can you make a video about emission spectroscopy?

[@ProfessorDaveExplains]

i'll put it on the list!

[@mohamadalani2506]

I love you man! you literally saved me from failing

[@sidramehak4266]

How did they figure this out at first?💀

[@L-8]

As a not-so-wise man once said, "Spectroscopy needs to be in a container."

[@-igor-]

The vibrational modes occurring in syn- fase are symmetric, and those in anti-phase are ANTI-symmetric (not Asymmetric)

[@ismailrasitdeniz7448]

Well, Dave thank you for your great explaining. I practise english (listening) and learn chemistry thanks to your channel. Great job! 👏👏

[@ndkhurram001]

Excellent explanation

[@gabrielalx]

I know this is a bit off topic but, at 8:24, the formula you wrote isn't a real molecule since it has an unsaturated equivalence of 1/2 ((2+4*2-9)/2). Idk if anyone else already pointed this out. Anyway good video made me understand better the spectroscopy chapter from Clayden's book!

[@ProfessorDaveExplains]

Huh? It's just a beta hydroxy ketone. Of course it's real.

[@pro-dmusic]

thanks Dave SO UNDERSTANDABLE

[@nkuidjoufabien4555]

Concise and precise video

[@vindyakelum90]

Oh what a lovely explanation . Thanks so much professor Dave ❤❤❤❤

[@GlynWilliams1950]

you gave me a new insight into organic spectroscopy. Thank you for a great video.

[@guilhermefacchini1163]

Parabéns pela aula!!!!! Extremamente didático! Você merece muito sucesso! Congratulations for the class!!! Extremely didactic! You deserve a lot of success!

[@ephraimabera4105]

No words for how grateful I am. You are such a blessing💖

[@mishalawilber1366]

Thank you Professor Dave for doing these videos!

[@secretaryfig5364]

EVERYTHING U SAID MADE SENSE, LOVE YOU DAVE NO HOMO

[@stellasedlmair3327]

i liked this video before playing it because i already knew i was gonna fully understand IR spectroscopy afterwards

[@chipcurry]

This is extremely well explained! One question: I assume these molecules are vibrating at a rate which just happens to coincide with the wave frequency in various parts of the infrared spectrum. Is this true, or are these molecules sped up or slow down somehow so they Will affect wave lengths in the infrared spectrum?

[@baggasher4527]

You deserve a nobel prize in education mate !

[@abigailbui5753]

you always make great videos but this one HIT! tysm 🤩🤩

[@antongoldwyn6881]

Best explanation on KZbin

[@DaniyalKhan-gt5ol]

Thanks Professor Dave

[@satishdora6170]

Now my concept is clear about ir spectroscopy thanks professor Dave ✅

[@amritas2400]

I was struggling to understand. Well explained! Thanks a lot, Professor Dave.

[@مريماسماعيل-ذ6ص]

Simple and great explaination , thanks a lot 🌸

[@VigneshVicky-lf1sq]

You're videos are so curious sir!... Then thnxx alot hve spent on u're valuable tm with us around a smart tech lifestyle!.. Forever to loving passion on a warm example!.. Within clear CRYTALLISATION

[@razasyed575]

lifesaver honestly

[@larissafreitas4674]

this video is amazing, thank u!! im studying for a test and helped a lot!! ~ Larissa- from Brazil

[@ericaschuller]

Thank you so much for such a great explanation! I have a question: is FT IR spectroscopy different from IR spectroscopy ? I’m trying to find a good source for FT IR spectroscopy and it’s being a bit hard..

[@consciousness5458]

lol 2 years late but ill answer your question anyway, FT or the Fourier-transform is the mathematical method used in order to create these sorts of spectroscopic graphs. He only explains how to analyze an example graph in this video

[@omidahomi712]

Great videos prof Dave! Keep it up

[@rosemariereinhardt5897]

omg, thanks for the video. I couldn't understand what my teacher was trying to explain to me until this moment, hope I'll pass the exam c:

[@talhashah9583]

thankyou sir , explanation is perfect 😍

[@KNR90]

This video uses a graph inverse of what scientists here use. Instead of dips we use spikes. Otherwise it shows the same information. I finally figured out how to build molecules this way 2 days before the exam

[@krishnannair606]

A lifesaver. Keep up the great work

[@DessalewDessalewagegnehu]

Thakyou sir your videos are still very usefull . You saved My energy , time

[@michaelmcgee2417]

I enjoyed that explanation. Happy Days.

[@dr.sagarvaidya4401]

Very lucidly explained

[@differentmarina]

Wow! Great explained! Thank you Dave :)

[@larayoussef824]

this will probably allow me to continue medschool! Thank you so much!

[@themoralshow902]

Thank you ❤️😃 Fans from Sri Lanka 🇱🇰😃

[@fredbatten9739]

brilliant you're lessons always help!

[@Ariella0JJ]

Thank you very much:D Now I understand the IR-Spectroscopy. I wached so many videos but I just understand yours. :D

[@ungkuzoeanysa]

first time I saw the symmetric and asymmetric stretches by my prof I lol-ed. Still do everytime I see it. Great vid!! Thanks for sharing!

[@ProfessorDaveExplains]

haha yep me too! in fact i only remembered him doing it and decided to do it myself because of how funny it looked.

[@typicalangryblackguy4022]

excellent explanation!