Organic Chemistry - Benzene NMR

[@vialoxn]

Wow thank you ChemPro Dao! You explained this concept so perfectly, you have a real gift for teaching. I appreciate the help.

[@marcoguillermo.]

Timestamps for Benzene NMR! 00:00 (Page 17) 03:15 - Ortho. 05:01 - Meta. 06:06 - Para. 07:11 - Recap. 07:43 (Page 21) Example time!

[@amatulkareem881]

Which book is this?

[@Pete-da-peter]

@@amatulkareem881 loudon

[@vedmaburuxova68]

Very good video. In my class (which I've failed before) we are told not to bother about interpreting this region, but with explanation it makes a lot of sense and is helpful. New exam tomorrow, I expect to use this knowledge!

[@billtran7429]

thanks so much ! Covered my 6h worth of lectures in 9min

[@latestcraftwithrubab6393]

Jazak allah ❤

[@asmaekacimi5403]

why the last example was a singlet a triplet and dd( why instead a dd evrey doublet alone as we had in first meta example)

[@nicolebelm]

I legitimately wish you were my prof

[@lindatti7591]

Clair and excellent thank you so much.

[@mosessapao8142]

Nice explanation I was so confused with this part ,,,thanx alot..

[@basyalpalpa5680]

Excellent video..

[@shwetamazumder9304]

Thank you so much, you literally saved me

[@llynn4206]

Hi, I am wondering in the case of the ortho substitution with two different substituents, would you count the hydrogen that is four bonds away so the Hc and Hd become a triplet of doublet rather than doublets of doublets?

[@chemprodao3382]

Hc has been seen to have little to none interaction with Hb. Similiar Hd has little to no interaction with Ha. So doublet of doublets or triplet are often observed. In rare case that Hc interacts with Hb, a multiplet would be observed because it would be a very messy signal.

[@crumblingasmredits152]

what does d,d or triplet,mean why we called d,d as a triplet???

[@chemprodao3382]

the triplet is the result of having two equivalent neighboring Hs. If the two neighboring Hs are NOT equivalent, you will have a doublet of doublet instead. Please check out my other video that on signal multiplicity that will explain this further.

[@anisnatasha1097]

hi sir, how to get your notes on this topics? can you help

[@souma7310]

Thank you so so much, it was very helpful for my exam

[@batman12349]

Thanks sir

[@fakhrulnawawi9681]

this is so cool man =)

[@siliconrod3248]

Dear Sir, For the singlet at 5:26 meta substituted benzene, cant that singlet be a triplet due to 4J coupling, or a doublet of doublet if the J value slightly different? Thank you.

[@chemprodao3382]

In theory, that singlet can be a triple or double of doublet if the interactions are strong enough. But in reality, we mostly observe it to be a singlet.

[@Jack_p01]

thanks a lot :)

[@cihancanatan6749]

What if you have less than 4 overall integration? I am doing some practice work on a site called NMR challenge in some questions there are less than 4 integration values like 1 with a triplet and 2 with a doublet. How should I interpret those?

[@chemprodao3382]

if the overall integration is 3, look like you have a 1,2,3 trisubstituted benzene.

[@fairyhwan1139]

Thank you so much!!!

[@sh.m.aslam456]

If two same type of substituents are attach at para positions then the all H will be singlet?? Because they didn't split each other??

[@chemprodao3382]

that would be correct!

[@altamashmomin4030]

thanks so much

[@sabamunawar202]

Thank you so much Sir

[@fabians.1474]

CLUTCH

[@courtneysumaya9533]

how about if it's 6?

[@chemprodao3382]

did you mean if there are 6 substituents connecting to the benzene? If that's the case, you wouldn't be seeing any aromatic H signal.

[@trishaekalkaua8764]

this was helpful. Naka

[@naimasaadallah1194]

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