That was very interesting to watch. I would have guessed the structure just based on the LiAlH4 and it is so interesting to see it proven with the NMR-Spectra.

Thanks Dr Tony St. John. Video is very interesting example. You may be up NMR spectrum example. I can print NMR spectrum and practice

Much appreciated, well explained, is it possible for you tl make more videos on NMR, splitting patterns , chemical shifts, coupling constants, sterochemical inequivalence? :)

i now it's a bit late to say but i really enjoy watching uv nmr predictions. İf u are still filming this type of videos, i would like to watch some cosy and hetcor nmr participated assigning 'couse i'm a bit bad at reading those two of them. i wish u good luck :)

Thank you for such a informative video 👍

Thank you!😃✨

Sir, Can you discuss NMR spectrum of some flavones and isoflavones?

I appreciate , well explained. just I couldn't figure out why e is not located between f & d as its closer to O than d, so it gotta be in down field.

My hardest excercise :( my own monster-molecule of my thesis. Really trying to get it, wish me luck.

why did you put c & d downfield when you said they should be upfield ( downfield is shifting toward left and up field is shifting toward right closer to 0)

@ziyingzhou1546

3 жыл бұрын

i also feel puzzled

@michellla93

3 жыл бұрын

@@ziyingzhou1546 I think he is saying c should be more downfield than b due to conjugation

@blackf.5242

2 жыл бұрын

Yeah, it should be the Opposite

bless you.

Thank you, lots of good advice :)

Thank you for lesson, your lesson is really enlightened me. Because I watched lots of video about in this topic, but your video is best.

As a professional I solved B structure in a minute or two, without pen and paper, but I want to add some remarks. 1. Without area under signals is more resembling Agatha Cristies' stupid novel. 2. When solving such problems with my students we use additionally additive rules for calculating chem shift, e.g. those in Pretsch book (Structure determination of organic compounds, Springer). Nevertheless, I appreciate your efford and like your channel.

❤ helpful Video India🇮🇳

Sorry i just cant figure out how the OH peak appears at this range in compound A ?

@TonyStJohn

6 жыл бұрын

Hi Mostafa, OH proton peaks will commonly move around/broaden a bit due to different solvents/proton exchange, etc.

@moustafaelawamy3240

6 жыл бұрын

thanks a lot

awesome video but how do you know when it is 2H, 3H etc?

@TonyStJohn

6 жыл бұрын

Geanella Vera-Avellan great question! A lot of the time that info will be provided in the problem. But in reality, you would have to find the area under each peak (yay calculus!) We would typically set the area of the smallest looking peak to 1, and then all the larger peaks are just a ratio of that original, smallest peak. In this problem however, it looks like I just estimated what the relative peak areas are. Once you see enough spectra the areas will start jumping out a little more!

I don't understand. Shouldnt the aromatics also be experiencing meta coupling?

@4.25 you said 3high multiplet instead of 2 high multiplet ( e)

ceo of "stickies"

god bless

Why is c more downfield?

hi,, i need you help,, can u help me to fine my own structur... i try to intrepretation but can not

I wish you were my teacher

😊

Can you please help me draw the structure for a compound. 🙏🏻🙏🏻🙏🏻 please give me your email