More Practice With H-NMR Spectra

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More Practice With H-NMR Spectra

Рет қаралды 146,511

Күн бұрын

Let's take another look at some H-NMR spectra to get a little more practice. What do we do with protons on an alkene? How do we predict a spectrum from a structure? How do we predict a structure from a spectrum? Practice makes perfect!
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Пікірлер: 87

@skyward7903 Жыл бұрын

Studying from your videos is literally so much better than my prof and the book. You explain the questions so well and easy!

@hamidalrawi2204 5 жыл бұрын

your videos are ALWAYS very helpful since the good old days of general chemistry :), i have no idea why you dont get hundred of thousands of views on some of your videos like other channels. Keep up the good work man, you are very helpful, thank you !

@kass6442 5 жыл бұрын

NMR always seems so much easier when someone else does it lol. Thanks great video.

@emteemte3985 Жыл бұрын

But when it comes to do it your self ....?????

@moiraamandamubani2625 5 жыл бұрын

this was useful thanks but how about C13 NMR

@thabangaaron1757 2 жыл бұрын

you are a real proffessor, i wish you were my lecture, your videos are always an extra aid towards our learning. i am ready to subscribe and join to any of your premium learnings

@Alchemist_171 4 жыл бұрын

Mastered it in 2 examples already. Thank you very much Prof. Dave!

@superEriccui 5 жыл бұрын

Truly an inspiration. Thank you so much for offering us free education.

@mollybach1846 2 жыл бұрын

THANK YOU SO MUCH FOR THE SUMMARIZED EXPLANATIONS OF THE PROBLEMS IT MAKES SOO MUCH SENSE!

@amadtariq8575 5 жыл бұрын

I have my final lecture exam for Orgo 1 next week so this was sooooo damn helpful. As always thank you Professor Dave!

@JacobDrosdick 4 жыл бұрын

Your explanation of this was so much easier to understand than my professor's

@anshumandewangan3378 2 жыл бұрын

Sir, you just saved me 8 lectures of my prof, that totals upto more than 8 hours. Thank you sir, for I will always be grateful of your teachings.

@sarahbrown6334 5 жыл бұрын

Thank you so much!!! You're videos have always explained the subjects clearly. I was lost about counting the neighbors, thank you for doing this step by step!!!

@scotthackney4747 11 ай бұрын

Your videos on NMR are very clear, thank you for making them.

@VanityNutrition 5 жыл бұрын

This was great practice; thank you so much!! (I agree with the others; this haircut suits you very well!)

@alexmiller3845 3 жыл бұрын

Also useful: the second to last compound analyzed, Ethyl Acetate, is useful to know the NMR spectra if using as a solvent in a reaction in order to determine if it is a contaminant when NMR spectra is ultimately obtained. You can tell if the peaks correspond to Ethyl Acetate.

@shibbi3689 5 ай бұрын

You look like my favorite professor both in college and KZfaq…

@heidi2266 5 жыл бұрын

Thank you so much! I first watched the theory video and then made this exercise and can't believe I just learned it.

@northamericanmuscle4499 Жыл бұрын

Thank you very much, Professor Dave. Your videos make my days go a lot better.

@khushikareddy3513 5 жыл бұрын

Love listening your video intro again and again🔊🎧 . That's stuck in my head . my sister always finds singing your intro song all the time. And now even she is adicted to it ✌. Nice music professor.

@chris2656 4 жыл бұрын

Dave you are actually my hero

@milakmussie3703 3 жыл бұрын

U r still a snack but I can't pretend Jesus is teaching me chemistry anymore

@nikkielandrum9890 2 жыл бұрын

😁😁🤣🤣🤣🤣

@aljazslemc9569 2 жыл бұрын

Gotta drink some water man, you're thirsty AF😛

@berky9600 6 жыл бұрын

Thank you so much greetings from Germany!

@luanalemos13 3 жыл бұрын

You taught all ways of basic problems ("basic" = I wasn't solving till now) Happy for finding u before graduation Also, I always thought we had to just accept where the functional groups land on the wave number axis, cause my teachers and also videos I've found 'd usually say that we need to just use the "characteristic peak" of each functional group as the prediction, so, we would always need a table next side or just have to decorate the most important ones... Anyways, u showed me the real logic involved, and in a real simple way. Thank you

@tadiwanashenyakuno7648 Жыл бұрын

THANX prof .i learnt a lot , i don need to open my slides i'm now ready for exAm

@nikitacatsburg3262 Жыл бұрын

I'm doing a course in Analytic Methods of Organic Chemistry, and your videos explain the subjects 3 times faster than my lectures do. Seriously, 15 min instead of 110 min 🤣 and I understand more from your videos than the lecture. Thanks a lot!!!

@avinashthalasila1712 4 жыл бұрын

thanks for the help Prof. Dave super helpful

@aniqaanwaar6040 2 жыл бұрын

I have my final exam next week. Thanks to covid we have to relay on KZfaq mostly... Thankfully I will be able to answer in my organic exam after watching this video... quite helpful ☺️

@mahanoor6720 5 жыл бұрын

Plz more videos on nmr spectroscopy

@rdhossain282 6 жыл бұрын

Sir you are doing really great .... Go ahead ..Your all videos are fully amazing ..All along i watch your videos and i get benefited ..thanks so much for your hard work sir

@azizabed7692 3 жыл бұрын

Thanks, Please is there video for the explanation for last structure you put?

@denisnedic5095 8 ай бұрын

I ust watched the video and asked myself the same question, did you get an answer in these 2 years?

@gurvirsingh2680 5 жыл бұрын

I am just amazed. you are too good

@chiaracostantino4992 2 жыл бұрын

Grazie mille, sei capace di rendere la NMR molto più facile da capire!

@reihanefarahani7425 4 жыл бұрын

Thank you so much💫

@peterherenvanuatarileo6297 4 жыл бұрын

Please do one for CNMR

@bakyousef9023 2 жыл бұрын

Thanks

@jasonakonnor9377 9 ай бұрын

thank you man

@user-qy7gr7xj8l 3 жыл бұрын

You are wonderful teacher

@niloofarkh4779 Жыл бұрын

THANK U SO MUCH

@precociousesther4440 4 жыл бұрын

THANK U

@angelicaalcaraz5866 6 жыл бұрын

Where was this last semester 😭😭

@matthewe.3038 2 жыл бұрын

You should really do a 2-D nmr lesson

@superhessu3 Жыл бұрын

very interesting!

@PunmasterSTP Жыл бұрын

More practice with H-NMR? More like "Magnificent videos, and the information can take you very far!"

@bic1349 2 жыл бұрын

amazing!

@antihardianty9250 5 жыл бұрын

Thankyou very much🙏 btw u look better with ur haircut prof 😍

@erikvx89 5 жыл бұрын

C4O2H8 example: Is it possible that the oxygen and carbonyl could be swapped (oxygen connected to the methyl and the carbonyl connected to CH2)?

@ProfessorDaveExplains 5 жыл бұрын

that would yield different chemical shifts! but they would be pretty close so it's definitely a tough call. if i remember correctly this is the software generated spectrum for the structure i gave so hopefully i didn't give the wrong one! but i think the 3H singlet would be way more downfield if directly next to an oxygen atom.

@erikvx89 5 жыл бұрын

Thank you! It's much clearer now! @@ProfessorDaveExplains

@jourdanhamme4065 4 жыл бұрын

Thank you :)

@karenopt 4 жыл бұрын

What does deshielding mean?

@ProfessorDaveExplains 4 жыл бұрын

it means withdrawing electron density away from the nucleus of the atom

@Mariana-rd6fx 3 жыл бұрын

Good afternoon Professor Dave! Thank you so much for you videos they help me a lot! However I had a bit of trouble understanding why is the proton C and D closer to the O than the proton A.

@chrisbe4801 5 жыл бұрын

Hello! I wanted to ask if you could do one more video on the topic. I had to work with a spectrum of Tolbutamide and somehow it showed one more proton than the actual structure has and I don't really find an explanation...

@MrYop224 5 жыл бұрын

Could anyone explain how alkene protons are deshielded? Why are they in the range of about 5-6.5 ppm?

@TommyFromEarth 5 жыл бұрын

I believe it is because the alkene carbon has more S character. This means that the carbon has pi bonds and in a pi bond, electrons are held more closely to a nucleus than in an SP hybridized bond. Therefore the electron density of the bond is closer to the carbon nucleus and so the hydrogen is de-shielded. Don't quote me on that though I'm not 100% sure!

@annerangel1007 3 жыл бұрын

In the first example is because of the presence of the COOH group. The Oxygen was pulling the electrons towards itself and so depending on the distance of the Protons from the COOH group, the more up or downfield they are. We can see that proton C (as he labeled) is more downfield because is closer to the COOH group than the proton D. Proton D is not deshielded because it is next to a methyl group, but because there is a COOH group in the molecule.

@divyajhugaroo2256 5 жыл бұрын

Thxs a lot sir😀 best wishes frm mauritius😃

@tonytam1185 4 жыл бұрын

couldn't recognize you man thought it's some other dude until I scroll down to the comments.

@ShalJay05 Жыл бұрын

This is ethyl ethanoate. How do we know that it's not methyl propanoate?

@rassimsimou1594 Жыл бұрын

Good

@n333n9 6 жыл бұрын

David i do have H-NMR, bu i'm not sure how to interrupt the data. Can i please send the spectrum private to you, but i don't want to be on the internet.

@n333n9 6 жыл бұрын

just please help me if the product is made or not. i have a suggested structure

@megawobbaffet8029 6 жыл бұрын

U r great sir!!! I am Able to get a lot of knowledge becoz of u thank very much keep it up .... And why have you cut u hair .....🤗🤗

@Rikardo5895 5 жыл бұрын

Where's the next part of this video? :c

@meklittilahun1732 3 жыл бұрын

Appreciate the video and this haircut is fire!!!!!

@ImtiazAhmed-re8ng 3 жыл бұрын

Aye professor! Thanks

@mr.azeemakatheprofessional2498 6 жыл бұрын

Professor dave rocks

@schinhna177 4 жыл бұрын

Sir which software your using in pc, to find that NMR peaks and 3d diagrams

@ProfessorDaveExplains 4 жыл бұрын

check the description section it's linked

@mohammadsamikhan5211 Жыл бұрын

The hair makeover stopped me for a while. Wasn't ready for that.

@schifoso 6 жыл бұрын

Bell'uomo!

@redbeaker2005 6 жыл бұрын

Thank you for explaining. Plus, you look better with a haircut.

@sudoheckbegula 3 ай бұрын

ranbir kapoor teches good chem

@yourlocalscribe948 Жыл бұрын

WHER E IS THE HAIR!?!?!?!?!??!

@beyou4296 4 жыл бұрын

I miss the long hair :( ty for the video, doe!

@cynthiasexton-wilson8962 5 жыл бұрын

Where's your hair and plaid shirt Dave? Did an evil girl get her mits on you?

@ProfessorDaveExplains 5 жыл бұрын

haha it was time for a change! perhaps i'll grow it back out one day.

@kriti4698 4 жыл бұрын

@@ProfessorDaveExplains actually you don't need to ,because you look good with short hairs

@ashwinpande7095 4 жыл бұрын

You look a bit like Adam Sandler with the short hair lmao. Great vid though, helpful for my exam next week :D

@ericard4165 6 жыл бұрын

Omg where's ur Jesus hair

@ProfessorDaveExplains 6 жыл бұрын

chopped it!

@ComandaKronikk 5 жыл бұрын

grow ur hair back