very helpful best teacher for nmr problems well taught in way easy to comprehend... sach batata huun sir 30-40 saal experience wale premier Institute k teacher bhi intni easy language me nmr problems nahi padha sakte.. jo technique aur problem solving me iss 30 minutes me sikha huun vo un teachers k 6-7 lectures me b nai samaj paya tha.. Very helpful content... GOD BLESS YOU SIR
Thankz😊 for your kind appreciation.Not only nmr video u can also watch other video they r too helpfull and must share to all your Chemistry colleagues..
Very nice NMR tricks sir. But I want to tell something. Hydroxy -OH proton chemical shift is not fix. It depends on intermolecular hydrogen bonding means indirectly on concentration. Sites of unsaturation should be represented with significance. It should be presented with index of hydrogen deficiency with respect to elements and bonds with rings. So it will be more correlated in structural elucidation. In the last, different types of methyl proton chemical shifts are presented in which methyl group attached to double bonded carbon called as allylic methyl group having allylic protons. Allylic methyl protons are having chemical shift 2.1 - 2.2. Respective methylene CH2 and Methine CH protons chemical shifts should be correlated with methyl protons. Means methylene protons are having higher value. Approx +0.3 with comparision to respective methyl protons. Methine protons are having higher value approx +0.3 with comparision to respective methylene protons. If methylene and methine protons chemical shifts are correlated with methyl protons then it will be more interested and useful for strucure confirmation. Thank u
@shubham Mahajan Your are right! the problem is not wrong actually its mistakenly written by me so its typographical error . Thank you so much for watching full video with 100 % concentration🙂.
Thank you for your precious suggestion..We could not able to upload more videos due to lack of time but we assure you that we will upload more helpfull tricky videos soon..
Ch3-ch2-ch2ch3 ,multiplicity of methylene group will be quartet but not sixet its signal will split only by adjacent not equivalent three methyl hydrogens only so its multiplicity should be quartet.plse clear my doubt
Sir in C3H6BrI problem As you said to correct if it is not CH3 and it is CH2 then the middle CH2 which is attached to both CH2 groups will give Quintet and how it will be Quartet ?
panguluri krishnaprasad @You r 100% ryte sir..there is typographical error in that problem ..extrmly sorry for that hope next tym we will take care about it..thnk you for your kind suggetion..🙏☺️
Dear frd, it was not example u can see there i did not shown any kinds of data for that particular example ..It was just dummy example to understand the concept of (n+1) rule..
Please answer ::In an NMR experiment, hydrogen atoms are subjected to a magnetic field of 5.0T. Determine the difference in energy between two spin States of the nuclei of hydrogen atom and the frequency of radiation required for NMR.
for 4.7 T magnetic field, 200 MHz frequency of radiation required..therefore for 5.0 T magnetic field 212.76 MHz frequency required..and we know that.. hv= hw where w is frequency of radiation.. therefore w=212.76 MHz.. energy difference between two spin states can be calculated using ∆E=hv equation h=6.623×10-34 now place all values in equation then ultimately u will get energy difference between two spin state in kJ/mole...Hope it helps you..☺️
Sir pls csir-net ke sare topic pr solved questions ki video banaye pls because most of the students prepared for csir-net by self study and the problem is most of them unable to practice more and more questions related to respect topic and on you tube there is very much less content on questions series so pls pls make video on problem based on syllabus of csir-net. And pls Suggest book for practice questions topic wise for csir-net examination?
Sir how to find equivalent proton .....sir plz video 2 days mai tricks ke saath banal....watching it on 3:30 in night ...really need ur help sir plz ....aglay Sunday ko test hai...plz plz sir
@@alischemistryThank you for your reply... please check my doubt again sir it is O2 but isotope 17 is it same explanation for it....some where I seen in net oxygen 17 isoptope is shows NMR
@@biplabchatterjee2185 yes you r correct oxygen-17, is only present at 0.037% natural abundance and it is nmr active .. Must watch our this video, your doubt will be cleared 100% ruclips.net/video/kDaso5CPc3I/видео.html
@@alischemistry sir I have one doubt @23:42 you said, benzene has 4 unsaturation sites but there is only 3 double bonds... How to identify unsaturation sites??
@@SK88386 yes very gud que..one unsaturation is considered for entire bezene ring..( 3 unsaturation from 3 double bonds and 1 unsaturation from ring= total 4 unsaturation for benzene ring).
To predict the compounds present in any sample you should have a basic idea of Material Chemistry. 1)Chemical Nature of compound(Eg.Lipid, protein, lipo-protein etc) 2)m/z value of compound or Fragment (eg m/z 600 u get 100s of compound) 3)m/z value of signature ion fragments of a peak(eg m/z 57, 71, 85, 99, 113, 127, 141,... which are indicative of normal and branched alkanes.) 4) Library search(updated library up to date) will give the relevance of the compound to its identical members. 5)if u find Unique Fingerprint of both unknown and yours are 98-100% identical your compound is almost identified. 6)if not you have to analyse compound detailed (eg. cyclic and branched, saturated, unsaturated, rearrangemenst ion, radical ion, cleavage, loss of groups) 7)if you are unsuccess to identify with above steps you have to obtain more clear MS with at least 3 standards using advanced spectra and get analysed with MS experts(eg. ESI-MS and ESI-MS/MS, NMR, MALDI MS/MS, Tandem Mass Spectrometry (MS/MS) based on the chemical nature of your compound. 8) library search is normally done by software attached to instruments like NIST, NBS, wiley etc have updated compounds. 9) if your compound is not yet found based on above steps it might be novel and you can constrict its structure based on signature ions, groups, rearrangements etc.
@@siddharth4890 yes exactly we have to do double the no.of carbons and add plus two and follow method if these atoms present oxygen, halogen, nitrogen as i mentioned .
This depends on spin coupling and spin coupling depends on substituent attached to ring.. If there is spin coupling then proton gets couple and get splited into doublet, triplet and multiplet.. If there is no spin coupling effect then protons remains as singlet..
According to the datas given for C8H8O2, I think the correct answer will be para methoxybenzaldehyde.Because Carboxyllic acidic Hydrogen comes at >10-11 and here it is 1 singlet H peak is given at 9.7, moreover three singlet hydrogen given at 3.77 but normal CH3 cannot come in that...! Please check your answer and let me know, because as far as I have seen that you have given p-methylbenzoic acid as correct answer.overall video was very helpful.Thank you.
Yes your are 100 % correct , this problem was mistakenly added by me and at that time I had no option to recorrect it ..Methyl grp attached to Benzene probably shows 2.1-2.4 delta value...(There was typographical error in that problem actual data was as given data a) 10.78 delta (singlet, 1H) b)7.75 ( doublet, 2H) c) 6.90 ( doublet, 2H) d) 2.47 ( singlet 3H) You can check trick at the end i have mentioned that methyl group attached to benzene will show 2.1- 2.4 delta value.
sheenu saini @ Unfortunatley it would not possible to make video on mass spectroscopy before 17 june but we will defnlty make vdo on mass spc.aftr 17 june..
Sandra you can try different examples for practice. The more you practice, the more you will feel comfortable in solving any sort of structure. Try some examples here: ruclips.net/video/vN6oYEjtkp8/видео.html ruclips.net/video/Px0i3tlRKzg/видео.html ruclips.net/video/dWJaM-vxmc8/видео.html
very helpful
best teacher for nmr problems
well taught in way easy to comprehend...
sach batata huun sir 30-40 saal experience wale premier Institute k teacher bhi intni easy language me nmr problems nahi padha sakte..
jo technique aur problem solving me iss 30 minutes me sikha huun vo un teachers k 6-7 lectures me b nai samaj paya tha..
Very helpful content...
GOD BLESS YOU SIR
Thankz😊 for your kind appreciation.Not only nmr video u can also watch other video they r too helpfull and must share to all your Chemistry colleagues..
Now I am much more confident !!😊
at 3:09 3rd CH2 gives (n+1)*(m+1)
so ch2 have (2+1)*(3+1)=12 .that is multiplet. becoz this CH2 is in different environment.
Vijaya Maurya @ Yes mam agree with u it is multiplet but we can call it sextet too.. Refference(Pavia).
Very nice NMR tricks sir. But I want to tell something. Hydroxy -OH proton chemical shift is not fix. It depends on intermolecular hydrogen bonding means indirectly on concentration.
Sites of unsaturation should be represented with significance. It should be presented with index of hydrogen deficiency with respect to elements and bonds with rings. So it will be more correlated in structural elucidation.
In the last, different types of methyl proton chemical shifts are presented in which methyl group attached to double bonded carbon called as allylic methyl group having allylic protons. Allylic methyl protons are having chemical shift 2.1 - 2.2.
Respective methylene CH2 and Methine CH protons chemical shifts should be correlated with methyl protons. Means methylene protons are having higher value. Approx +0.3 with comparision to respective methyl protons. Methine protons are having higher value approx +0.3 with comparision to respective methylene protons.
If methylene and methine protons chemical shifts are correlated with methyl protons then it will be more interested and useful for strucure confirmation.
Thank u
Thank you so much for sharing your precious knowledge..🙂🙂🙂
Mujhe aaj tak kisi ne etna aacha nhi sikhaya...
Or ha this is my first comment on RUclips! Thank uh so much
Thank you brother 🙂
Must share to all your chemistry groups and frds☺️
@@alischemistry sure🙂
Very excellent explanation very easy to understand thank you 👌
Thank you so much sir for assembling the tricks and lucidly explaining them in a nutshell.
Thank u so much for your kind apreciation..☺️🙏
Very helpful. I am preparing for the university exam. Thank you.. 🙏
All the best
Excellent sir, Its really helpful to chemistry students.
Thank you mam👍🙏
Your video is great
29:15 valency of one carbon attached to bromine exceeds
Explanation was wrong
Thank u so much sir,,please upload video tricks on IR.. And what types of questions can come in exams from Uv-visible spectra ..
Thanku sir very helpful this video for me 7 marks save for me 🤗
Kya baat hai ALI bhai. Maa sha ALLAH !
Very easy understanding 😊❤ thanks.
Glad to hear that😊👍🙏
very good and easy method of teaching helped me alot thak you sooooo much
thank u Abrar sir☺️
29.13
C3H6Brl example galat hei sir ch3 ko dono side se bond kaise lagega 🤔
But explantation is good
Thanks you so much 😇
@shubham Mahajan
Your are right! the problem is not wrong actually its mistakenly written by me so its typographical error . Thank you so much for watching full video with 100 % concentration🙂.
F nmr and P nmr ki upar ak video baanai ne with good example. Sir. Nice video
monish pandey @ohk done bro..we will make video on it not yet but soon..
very easy method to understand doublet.....,
..
Glad to hear that
Such a superb explanation on nmr.. 👍👍
Thanks a lot 😊
Good teaching & godbless you👍
Thank u so much for your kind appreciation..😊
Sir..( C3H6BrI )..ke example me( Br)jis carbon se attached hai uski valency incomplete hai...
Ho tumcha bolna barobar aahe pan ..it was just typographical error..
very nice.. one thing I didn't get that why we have to calculate site of saturation?
Its site of unsaturation and it is calculate to knw that how many no.of unsaturated bonds are dere..
sir in one example, you calculated site of saturation=4. but there were 3 double bonds
@@muhammadasfandyar8895 one site of unsaturation is consider for benzene ring..
@@alischemistry oh.. now i got it.. jazaak Allah
Sir plz uploads more video for. NET&Msc purpose .your video helpfull solve to problems
Thank you for your precious suggestion..We could not able to upload more videos due to lack of time but we assure you that we will upload more helpfull tricky videos soon..
@@alischemistry Thanks
@@shubhamgupta9236 If you find that our videos are helpfull then kidnly share to your all chemistry collegues..👏 Thank you...
@@alischemistry waiting for tricky video
Ch3-ch2-ch2ch3 ,multiplicity of methylene group will be quartet but not sixet its signal will split only by adjacent not equivalent three methyl hydrogens only so its multiplicity should be quartet.plse clear my doubt
Sir can you plz tell me . Ki aapne 3.8 delta ko dekhke kese bataya ki kya ho sakta hai ?uska bhi koi chart ho to plz de dijiye
Pls upload more videos related to nmr spectroscopy.and other topics .
Sir in example 2. Sides of unsaturation 4 but in derived structure we get 3 unsaturation.how?
No thnks i got it three double bond and one ring
Sir ekdam mst very easy trick 👌👌👌👌
Kindly share to your all chemistry collegues👏🙂
what's the purpose of value of sites of unsaturation.
To find out no.of unsaturated bonds in molecule..
@@yendavarunkumar6824 one unsaturaration is consider for benzene ring..
Ok sir thank you
excellent video .sir thanx for it .upload many more such video
Sir how can I understand there is methyl group benzene if delta2.2ya delta 6.6 hai here plz reply as soon as possible
the delta value of methyl group which attached to benzene is mostly in between 2.1-2.4
Sir in C3H6BrI problem As you said to correct if it is not CH3 and it is CH2 then the middle CH2 which is attached to both CH2 groups will give Quintet and how it will be Quartet ?
panguluri krishnaprasad @You r 100% ryte sir..there is typographical error in that problem ..extrmly sorry for that hope next tym we will take care about it..thnk you for your kind suggetion..🙏☺️
1:57 the compund you have taken will give only two nmr signal it should be triplet and quartret...
Dear frd, it was not example u can see there i did not shown any kinds of data for that particular example ..It was just dummy example to understand the concept of (n+1) rule..
Please answer ::In an NMR experiment, hydrogen atoms are subjected to a magnetic field of 5.0T. Determine the difference in energy between two spin States of the nuclei of hydrogen atom and the frequency of radiation required for NMR.
for 4.7 T magnetic field, 200 MHz frequency of radiation required..therefore for 5.0 T magnetic field 212.76 MHz frequency required..and we know that.. hv= hw
where w is frequency of radiation..
therefore w=212.76 MHz..
energy difference between two spin states can be calculated using ∆E=hv equation
h=6.623×10-34
now place all values in equation then ultimately u will get energy difference between two spin state in kJ/mole...Hope it helps you..☺️
@@alischemistrythank u sir 8.49×10 -5 KJ /mol is answer is it right
@@VikasSharma-bm9vx ☺️
Sir pls csir-net ke sare topic pr solved questions ki video banaye pls because most of the students prepared for csir-net by self study and the problem is most of them unable to practice more and more questions related to respect topic and on you tube there is very much less content on questions series so pls pls make video on problem based on syllabus of csir-net.
And pls Suggest book for practice questions topic wise for csir-net examination?
We already uploaded CSIR NET 2018 june que.with perfect soln part B ruclips.net/video/tL49OMMjERw/видео.html
Sir i m having problem in using delta value...i am not getting how use for OH OR for ny other functional group? Plz help me
simran kaur @ U should have to remember all NMR values..like aldehyd,ketone ,acids,alcohol etc.
Hume kese pata chalega ki compound aliphatic hai ya aromatic?
Use Huckels rule to know aromatic or aliphatic..(4n+2pi)compounds
Sir in C9H12 questiion Given NMR 6.78(S,3H) how you take as 3H not 1 CH3 ?
simran kaur @Bcz of its 6.7 d value. It clearly indicating dat dere is benzene ring den how it could be CH3?
It's work's very nice👍
Thank u so much..u can support us giving thanks😊🙏👍
Thankyou so much Sir....God bless you.
In C3H6BrI example Br attach to CH3 then carbon with 5 bond how this possible?
Yes there was a typographical error in that problem..extremely sorry for that..👍😊
sir.. how we get to know that 3.49 delta means EWG present hai..
Obviously because of high delta value which shows that there is a deshielding effect and which is caused by EWG ..
Sir how to find equivalent proton .....sir plz video 2 days mai tricks ke saath banal....watching it on 3:30 in night ...really need ur help sir plz ....aglay Sunday ko test hai...plz plz sir
DR ZIA@ it is not possible to make vdo in two days..i will make video for your finl exm done👍👍
Sir plz make video on mass spectroscopy fragmentation pattern and fragmentation problems
Rahul Chaudhari @sure ..
Main Syed Sabir sir AK number explanation
☺️
Thankyou so much sir this is very helpful🤗
Most welcome 😊
Mass spectrum of toluene display the fallowing peaks m/e 92,91,65 ....more example
It's helpful for physic
Sir 17O2 is shown by NMR ACTIVE ONLY OR it is also shown by RAMAN ACTIVE also..... please let me know your answer on this
Biplab Chatterjee@ M not getting your que. R u asking about O2 (oxygen 17) ?
@@alischemistry yes sir...Sorry for wrong notation
@Biplab Chatterjee O2 is non magnetic nuclei and it is inactive in NMR as well as IR, however it is active in Raman spectroscopy.
@@alischemistryThank you for your reply... please check my doubt again sir it is O2 but isotope 17 is it same explanation for it....some where I seen in net oxygen 17 isoptope is shows NMR
@@biplabchatterjee2185 yes you r correct oxygen-17, is only present at 0.037% natural abundance and it is nmr active ..
Must watch our this video, your doubt will be cleared 100%
ruclips.net/video/kDaso5CPc3I/видео.html
You are so good sir and thanks for this video
hyeee>>>>> nitrogen presence in a molecule will add one H to hydrogen
4 unsaturation means... 4double bonds??
Yes it is correct👍
@@alischemistry @14:34 there is 3 double bonds (from benzene only) but the unsaturation is 4
@@alischemistry sir I have one doubt @23:42 you said, benzene has 4 unsaturation sites but there is only 3 double bonds... How to identify unsaturation sites??
@@SK88386 yes very gud que..one unsaturation is considered for entire bezene ring..( 3 unsaturation from 3 double bonds and 1 unsaturation from ring= total 4 unsaturation for benzene ring).
@@alischemistry Ohh Thank you sir..
In C9H12, sites of unsaturation is 4 but in the benzene structure there is 3 only . That part i have some dbt . Can you explain sir?
In benzene always 4 sites of unsaturation are considered 3 unsaturation for 3 d.b insides the ring and one for entire ring.
Thank you so much.🙏
Very nice explanation sir .👌
🙏😊
(n+1)(m+1) rule is used for different neighboring proton
Wrong explained
@@PinkiKumari-tv3vq This video based on trick..its not matter about n+1 or m+1 rule we explained how to crack problem within minute..
What is the use of finding number of sites of unsaturation here?
To estimate the number of double and triple bonds or ring in molecular structure.
Thanks a lot
Sir I have questions which I am not able to solve so is there any way to contact you
Site of unsaturation se kaise pata kar paa rahe h
Ki structure sahi bana hai ki nahi?
Not only site of unsaturation is used to predict structure but also IR resonance and NMR signals ..
🙏🙏🙏nice video....
😊👍 Kindly share to your all friends🙏
thank you sir for information, can you give some information about how to predict data in LC-MS ?
To predict the compounds present in any sample you should have a basic idea of Material Chemistry.
1)Chemical Nature of compound(Eg.Lipid, protein, lipo-protein etc)
2)m/z value of compound or Fragment (eg m/z 600 u get 100s of compound)
3)m/z value of signature ion fragments of a peak(eg m/z 57, 71, 85, 99, 113, 127, 141,... which are indicative of normal and branched alkanes.)
4) Library search(updated library up to date) will give the relevance of the compound to its identical members.
5)if u find Unique Fingerprint of both unknown and yours are 98-100% identical your compound is almost identified.
6)if not you have to analyse compound detailed (eg. cyclic and branched, saturated, unsaturated, rearrangemenst ion, radical ion, cleavage, loss of groups)
7)if you are unsuccess to identify with above steps you have to obtain more clear MS with at least 3 standards using advanced spectra and get analysed with MS experts(eg. ESI-MS and ESI-MS/MS, NMR, MALDI MS/MS, Tandem Mass Spectrometry (MS/MS) based on the chemical nature of your compound.
8) library search is normally done by software attached to instruments like NIST, NBS, wiley etc have updated compounds.
9) if your compound is not yet found based on above steps it might be novel and you can constrict its structure based on signature ions, groups, rearrangements etc.
You can visit to my channel for interesting mcqs with proper solutions okay...
thank you sir ...easily explained
Sir, u r great
U doing best👍
In 2nd problem there is a 4 unsaturated but in benzene there is only 3 double bonds are exist
yes but one unsaturation is count for a ring hence 4 unsaturation are considered for benzene ring
Excellent work
Thank u bhai😊👍
Excellent explanation, Thank you very much sir
☺️👍
Can you provide the ranges of NMR?
In next video "introduction to NMR" we will try to cover theory and all basics regarding NMR..
excellent trick Sir ji👍 👍 👍 👍
Sir Kya hydrogen ka hamesa 2 hi add hoga??
I did not getting bro wat actually you wan to ask!
Sir u said in sites of unsaturation u add +2 for hydrogen.so m asking that it's always to add +2for hydrogen or it will change it?
@@siddharth4890 yes exactly we have to do double the no.of carbons and add plus two and follow method if these atoms present oxygen, halogen, nitrogen as i mentioned .
Ok sir thanks
#Very_Usefull...
Nice👌👌👌
Best trick sir plz make other tricky vedio on based net csir
ripu sudan @ Sure we will make more videos n tricks stay connected..
simple and clearcut explanation
Sir please make c13 nmr videos with examples
Sure🙂..
Kindly share video to your all frds n chemistry watsp.groups.✌️👍
Thanks sir nice explanation
Carbon Nmr pr bhi video banaye
Sure😊
Excellent👍
Thank you! Cheers!
Sir, in C10H14 qstn how will 5 protons have a singlet only?
This depends on spin coupling and spin coupling depends on substituent attached to ring..
If there is spin coupling then proton gets couple and get splited into doublet, triplet and multiplet..
If there is no spin coupling effect then protons remains as singlet..
@@alischemistry thank you sir.
According to the datas given for C8H8O2, I think the correct answer will be para methoxybenzaldehyde.Because Carboxyllic acidic Hydrogen comes at >10-11 and here it is 1 singlet H peak is given at 9.7, moreover three singlet hydrogen given at 3.77 but normal CH3 cannot come in that...! Please check your answer and let me know, because as far as I have seen that you have given p-methylbenzoic acid as correct answer.overall video was very helpful.Thank you.
Yes your are 100 % correct , this problem was mistakenly added by me and at that time I had no option to recorrect it ..Methyl grp attached to Benzene probably shows 2.1-2.4 delta value...(There was typographical error in that problem actual data was as given data a) 10.78 delta (singlet, 1H)
b)7.75 ( doublet, 2H)
c) 6.90 ( doublet, 2H)
d) 2.47 ( singlet 3H)
You can check trick at the end i have mentioned that methyl group attached to benzene will show 2.1- 2.4 delta value.
Nicely explained
Milind Patel@thank you sir😇🙏
Sir please solve more question nmr for net exam
Kirti Kumar @ohk defintly we will solve more problems n lectures regarding CSIR-NET but it will be posible in next month..
Very nice video sir ...thank uh so much ,sir plz upload mass spectroscopy video before net exam
sheenu saini @ Unfortunatley it would not possible to make video on mass spectroscopy before 17 june but we will defnlty make vdo on mass spc.aftr 17 june..
Very well explanation sir
Nice explained
Thanks ..
Sir ap value dakhka kaisa bol raha ha benzene hoga....kiya halogens add hoga...kaisa????
I m not getting you what actually u r saying..plz mentioned example..
2.4(singlet,3H)aisa kuch example
@@nekhla3929 near about 6.8 to 7.6 moslty benzene ka hi chemical shift hota hai isse ap direct kahesakte ho ke benzene honga structure mai.
Thank uu sir...but other nmr value ???
You should have to know about basic chemical shift of all groups..
Thank you so much sir very helpful
In C3H6BrI how 1CH3 isn't it CH2?
simran kaur @yes it is correct ..it is CH2 not CH3 .. it is typographical error..👍
okay thankyou sir
If it is ch2 then middle ch2 should b pentet not quartet.
Very helpful 😊😅😮😮😂❤
Awesome teaching sirji
I have problem to solve ir reated question .pls tell from basics
Don't worry for that we will upload video on IR problems soon..
Thanks sir
Is Jo 2 example liya ap ne C9H12 4 UNSATURATION he but result me 4 double bond to nai dhikhaya he
let me check first ..i will clear it..
@@alischemistry sorry it's right benzene has 4 side of UNSATURATION I got the point
nice undustanding sir.thanx
Sir shall you please upload the vedio of the structure determination of c10h13cl
Kindly forward me its data..watsp 9503286924
Sandra you can try different examples for practice. The more you practice, the more you will feel comfortable in solving any sort of structure. Try some examples here:
ruclips.net/video/vN6oYEjtkp8/видео.html
ruclips.net/video/Px0i3tlRKzg/видео.html
ruclips.net/video/dWJaM-vxmc8/видео.html
Thanks lot 😍😍
Can you please send me the PDF of spectroscopy by Donald pavia
very Nice sir . thank you...
Tq so so mch sir👍👍👍👍
Uv IR ke bhi problem video chahiye sir
Sure..After covering NMR theory we will do it..🙂
@@alischemistry ok sir
Thank u so much sir ji 😊😊
Plez upload video of mass spectroscopy. problem,value.