More Practice With H-NMR Spectra

Рет қаралды 145,446

6 жыл 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!

@kass6442 4 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

@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 !

@Alchemist_171 4 жыл бұрын

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

@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!!!

@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!

@mollybach1846 2 жыл бұрын

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

@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.

@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

@northamericanmuscle4499 Жыл бұрын

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

@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.

@scotthackney4747 9 ай бұрын

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

@superEriccui 5 жыл бұрын

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

@JacobDrosdick 4 жыл бұрын

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

@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.

@avinashthalasila1712 4 жыл бұрын

thanks for the help Prof. Dave super helpful

@chris2656 4 жыл бұрын

Dave you are actually my hero

@VanityNutrition 5 жыл бұрын

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

@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

@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

@berky9600 6 жыл бұрын

Thank you so much greetings from Germany!

@gurvirsingh2680 5 жыл бұрын

I am just amazed. you are too good

@reihanefarahani7425 4 жыл бұрын

Thank you so much💫

@tadiwanashenyakuno7648 Жыл бұрын

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

@user-qy7gr7xj8l 3 жыл бұрын

You are wonderful teacher

@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.

@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!!!

@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 ☺️

@shibbi3689 3 ай бұрын

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

@chiaracostantino4992 Жыл бұрын

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

@bic1349 2 жыл бұрын

amazing!

@niloofarkh4779 Жыл бұрын

THANK U SO MUCH

@precociousesther4440 4 жыл бұрын

THANK U

@jourdanhamme4065 4 жыл бұрын

Thank you :)

@divyajhugaroo2256 5 жыл бұрын

Thxs a lot sir😀 best wishes frm mauritius😃

@antihardianty9250 5 жыл бұрын

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

@bakyousef9023 2 жыл бұрын

Thanks

@jasonakonnor9377 7 ай бұрын

thank you man

@superhessu3 Жыл бұрын

very interesting!

@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😛

@mahanoor6720 5 жыл бұрын

Plz more videos on nmr spectroscopy

@meklittilahun1732 2 жыл бұрын

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

@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.

@angelicaalcaraz5866 6 жыл бұрын

Where was this last semester 😭😭

@peterherenvanuatarileo6297 4 жыл бұрын

Please do one for CNMR

@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 .....🤗🤗

@ImtiazAhmed-re8ng 3 жыл бұрын

Aye professor! Thanks

@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...

@rassimsimou1594 Жыл бұрын

Good

@matthewe.3038 2 жыл бұрын

You should really do a 2-D nmr lesson

@schifoso 6 жыл бұрын

Bell'uomo!

@Rikardo5895 5 жыл бұрын

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

@azizabed7692 3 жыл бұрын

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

@denisnedic5095 6 ай бұрын

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

@mr.azeemakatheprofessional2498 6 жыл бұрын

Professor dave rocks

@PunmasterSTP Жыл бұрын

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

@tonytam1185 4 жыл бұрын

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

@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

@schinhna177 3 жыл бұрын

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

@ProfessorDaveExplains 3 жыл бұрын

check the description section it's linked

@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.

@ShalJay05 11 ай бұрын

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

@karenopt 4 жыл бұрын

What does deshielding mean?

@ProfessorDaveExplains 4 жыл бұрын

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

@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