CSIR-UGC NET June 2019 Organic Chemistry Solutions

In this video, I have discussed the questions from Organic Chemistry part which was asked in CSIR-UGC NET June 2019.
Video Chapter Timeline:
0:00 Introduction
0:43 Chemistry of Benzyne Intermediate
1:16 Reactivity of Dienes in Diels-Alder Reaction
1:43 Kolbe's Electrolysis
2:16 Cleavage of Carbohydrates by Periodic acid
3:49 Question Based on the Heterocyclic Chemistry
4:54 Chemistry of Carbocation Intermediate
5:46 Relationship between Molecules
7:30 Bromination of Chiral Cyclohexene
8:28 Benzoin Condensation/Benzil-Benzilic Acid Rearrangement
8:40 Reduction of Ketone
11:10 Chemistry of Grignard Reagent/Michael Addition
12:09 Bromination/Elimination
12:31 Aldol Reaction of Lithium Enolate and Boron Enolates
13:20 Ireland-Claisen Rearrangement
14:46 Vilsmeier-Haack Reaction of Heterocycles
15:55 Trimethylsilyl Enolate/ozonolysis/Reduction
16:38 Baylis-Hilmann Reaction/Michael Addition
17:26 Conjugate Addition using Gilman Reagent followed by Simmons-Smith Cyclopropanation
17:45 Alpha Methylamination/Elimination/Conjugate Addition
18:50 Synthesis of Indole via Palladium Catalysis
19:46 Dienone-Phenol Rearrangement
20:49 Synthesis of Epoxy Aldehyde
22:15 Barton Reaction
22:45 Stable Conformer of Cyclohexane bearing Halogen in the Ring
23:16 Based on Mass Spectrometry and NMR
23:27 Stable Conformer of Substituted Cyclohexane
23:38 Problem Based on NMR
24:40 Problem Based on Photochemistry
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For help regarding organic chemistry topics, send me an email at [e-mail]

[@rajandeepkamboj5532]

Thank u so much sir you make problems so easy in a easy way explaination

[@parthbhatt4421]

Which book you refer for csir net and gate

[@nazmaahmed4766]

Video is very much useful for us for exam.

[@manojsuman4938]

Hello sir. ....solved problems ka pdf link bhi available ho jayega kya

[@scientistd3656]

At 13;01 both give syn product

[@nazmaahmed4766]

Thank you very much Sir

[@abhinandanabhinandan4651]

Sir TIFR ke liye guide kare...plz

[@AnkitVerma-yk1ho]

Three memberd ring is stabilized by dancing resonance and that is one of the most stable carbonation ...so 2nd is correct

[@ChemoSpecific]

Any reference? Or similar examples..it will help me read about it. Do share

[@AnkitVerma-yk1ho]

Sir at 22.30 questions is Barton + Beckman fragmentation ...I have clicked 4th option...get hint from your fragmentation reactions vedio....just check that question once more

[@ChemoSpecific]

Yup. You are right. That's why I said few other has also suggested me the same. That's why I mentioned in the video that option 4 can be correct as well.

[@ChemoSpecific]

One of the students shared with me two references which suggest the answer to question at 7:32 is option 3 and answer to problem at 20:57 is option 2. Thanks

[@veerpalkaur9636]

Respected sir plz shared with us also reference to question at 7:32

[@ChemoSpecific]

@@veerpalkaur9636 Drop me an email at [e-mail] or ping me on [phone]. I will shared the reference images. Thanks

[@tahshinmanaur1633]

Thank You So Much Sir ❤

[@hiralalprasad6286]

Haae mil gya beta aaj...

[@saba-mi4my]

Sir pls clayden books ke chapters ki videos upload karein

[@ChemoSpecific]

Sure

[@dr.chemistry9127]

Hello Sir Pl. make video on CSIR-NET Dec. 2019

[@ChemoSpecific]

Soon

[@ROHITSingh-cw4yt]

Sir Study aap achhe se kra rhe h lekin jo aap screen pe dikha rhe h o shi se nhi dikh rha h please question size ko aur bda karke dikhaye

[@ChemoSpecific]

Sure, I will take care that. Thanks a lot for your feedback. Such feedback helps me improve.

[@ankush2511]

20:04 pe jo question hai uska ans main methyl ki jagha kai youtuber ester wale group ko migrate krke bata rhe.. Kya aapka ans sahi hai ?

[@ChemoSpecific]

Jahan Tak Meri understanding hai..I think Mera answer correct hai. But we all have to wait for the official answer key.

[@ChemoSpecific]

Correct answer is option 1. In the first one i.e., A, Ph migrates and in the second one i.e., B, COOEt migrates. Here is the reference. Please go through it and thanks a lot for letting me know. pubs.acs.org/doi/abs/10.1021/ja00814a022

[@ChemoSpecific]

And just to update you, the relative migratory aptitude in the case of Dienone-Phenol rearrangement is Me

[@TheShailneha]

Its not about migratory aptitude its about stabilization of positive charge. refer clayden @@ChemoSpecific

[@ChemoSpecific]

@@TheShailnehakzbin.info/www/bejne/b5_Sg4Jmftekn5I I have corrected it in this video

[@rajasekhar6552]

Physical chemistry uploud karo.tq sir

[@ChemoSpecific]

Thanks a lot for your comment. I don't have the expertise in the area of physical chemistry therefore, I don't make it's videos.

[@sachinarora547]

Nmr kk signal 5 aayenge bcoz two h are diastereotopic

[@ChemoSpecific]

If you see carefully the electronic environment of both the hydrogens is same therefore, as per my understanding we should get four signal. Let's just wait for the official answer key. Thanks for your input

[@sachinarora547]

@@ChemoSpecific ssir if u calculate j value of both bridgehead it is different

[@ChemoSpecific]

Please check this reference where this bridged compound has been synthesized. Journal of Organic Chemistry, 71(23), 8957-8960; 2006 (doi.org/10.1021/jo061385s) and here is the reported 1H NMR data 1H NMR (CDCl3): δ 1.76 (d, J = 1.8 Hz, 6H), 1.87 (t, J = 1.7 Hz, 2H), 3.02 (m, 2H), 6.06 (dd (app. t), J = 1.9, 2.0 Hz, 2H) ppm Number of peaks are 4. I hope your doubt is clear.