Excellent teaching . Every one can understand your explanation. The person who With out knowing anything about group theory he can understand now by watching this video.
Wonderfully explained sir...keep it up and thank you so much for this video. Please make a video on statistical thermodynamics covering questions from NET point of view.
Hi...make a video on allowed transition between various irreducible representations...this topic is really scoring and demands less time comparatively than the other group theory topic.... Thank you.
for both raman and IR active, it is E' due to the filled last two columns but in case of E" those two columns are filled too. So will E" be both raman and IR active..
Thank you sir for teaching so well. I am able to grasp concepts way faster. Could you suggest a good book for group theory ...say IIT-JAM level? I think that details regarding character tables are not asked atleast till BSc level i.e.JAM level
sir first of all thank you very much for explaining group theory so nicely. secondly Is that if the character table consists of i than how do we take that in to consideration.
Good work in exam one more type question comes that is based on multiplication like (S4.C4) or S4 is equivalent to ..so plz make vedios on this topic when you hv free time
Sir I have 2 questions.. Is IR active modes always represented as xy, yz or zx??? And in 2nd last column if there is translation active mode present, then in the last column there must be IR active mode in the same row??
For H2O- Reducible-3A1+A2+2B1+3B2 Rotational-A2+B1+B2 Transalational-A1+B1+B2 Vibrational-2A1+2B2 BOTH IR AND RAMAN ACTIVE-A1+B2. SIR THIS IS RIGHT OR WRONG?
Sir when should I use the mutual exclusion principle,bcoz according to it Raman active modes are not ir active and viceversa.In this particular example of D3h we do get ir and Raman modes for a particular Mulliken symbol.plz explain sir??
A particular mode of vibration that does not change during vibration is ir inactive...other modes are ir active for molecules having centre of symmetry.
There are 3 Cartesian coordinates (x,y,z), on identity operation (E) they are unchanged. character for unshifted vector is 1. so 3*1=3 thq sir .nice class.
Thnk you sir...Make the last video lecture on group theory so that we review all your videos of this topic in order to start solving previous year problems....
Reducible representation-3A1+A2+4E
Rotational-A2+E
Transalational-A1+E
Vibrational- 2A1+2E
Both Raman and IR active-2A1+2E
Excellent teaching . Every one can understand your explanation. The person who With out knowing anything about group theory he can understand now by watching this video.
Reducible representation is 3A1+A2+4E vibrational mode 2A1+ 2E A1 is Roman active and E is both Raman and IR active
OK I will check
Sir I am gaining confidence in group theory nowThank you so much sir..
U made the gp theory so simple for us sir,,,,, thnkuuuuu
Thank you Sir for explaining it so well. Now I am able to solve the questions relating to this topic.
Thank you very much sir...you r techng vry easy way.,excellent
Nice explanation sir and please share video on pericyclic reaction
Superb pls upload such videos
Thank you sir for explaining i like your videos
Wonderfully explained sir...keep it up and thank you so much for this video. Please make a video on statistical thermodynamics covering questions from NET point of view.
Hi...make a video on allowed transition between various irreducible representations...this topic is really scoring and demands less time comparatively than the other group theory topic.... Thank you.
Thank you sir for great explanation. Sir please make video on mass spectrometry
For ammonia total representation is 3A1+A2+4E....viberational is 2A1+2E...and these both are Raman and IR active.
Credit goes to your teaching Sir :)
Thank you for this video. You made it so easy.
Thanku so much sir your effort will make us success....Sir plz make some revision videos with max number of questions.
Good work sir, which will be best reference book for practising group theory problems.
Thank you sir, nice explanation
for both raman and IR active, it is E' due to the filled last two columns but in case of E" those two columns are filled too. So will E" be both raman and IR active..
Happy to use adblock
sir thank u for this video can u teach us the molecular spectroscopy part sir please.
Sir if you have time please make a video on what is electrical dipole allowed transition..And thank you so much sir..
Thank you sir for teaching so well.
I am able to grasp concepts way faster.
Could you suggest a good book for group theory ...say IIT-JAM level?
I think that details regarding character tables are not asked atleast till BSc level i.e.JAM level
Sir, please attach the link at 39:17.
Wr is the attached link sir i cant find that video
sir first of all thank you very much for explaining group theory so nicely. secondly Is that if the character table consists of i than how do we take that in to consideration.
sir plz solve the question of December 2014 , set A ,question no-133 & also give an explaination for trans-butadiene
sir u r ossm
Sir my doubt is how the principle axis of rotation is 2 c3... It is C3 but how it is two times.. We took Z axis.... right...
Do we need to memorise the character tables?
very nice sir
sir in this video how to find linear and binary function i.s x,y,z or Rx,Ry,Rz or xy,xz,yz for any character table . sir please tell us.
Wow..thanks... I am also eager to know.
sir plzzz ap group theory mae allowed transition and polarizibility kis axis pe hogi plzzz samjhadijiye na plz bahoot dikkat h isme
great explanation
Gate chemistry hi
u did nt reply on my comment Sir
sir if in NH3 three hydrogens are replaced by fluorine atom ,will there be any significant change in vibrational modes
how can we do practice of these topics which you uploaded
Good work in exam one more type question comes that is based on multiplication like (S4.C4) or S4 is equivalent to ..so plz make vedios on this topic when you hv free time
Sir how to find out the translational rotational dimension in any character table? Because I'm not able to find out.
Sir, can you tell us from where this contributions come?
Sir I have 2 questions.. Is IR active modes always represented as xy, yz or zx???
And in 2nd last column if there is translation active mode present, then in the last column there must be IR active mode in the same row??
I salute you sir.....
very helpful for me
Sir,how to relate symmetry with the modes of vibration
Thanks a lot sir
For H2O-
Reducible-3A1+A2+2B1+3B2
Rotational-A2+B1+B2
Transalational-A1+B1+B2
Vibrational-2A1+2B2
BOTH IR AND RAMAN ACTIVE-A1+B2.
SIR THIS IS RIGHT OR WRONG?
thnx sir
Sir when should I use the mutual exclusion principle,bcoz according to it Raman active modes are not ir active and viceversa.In this particular example of D3h we do get ir and Raman modes for a particular Mulliken symbol.plz explain sir??
it is applicable for molecules which have centre of symmetry
But all cento symmetric molecules are ir inactive.they can never be active.in that case we may predict Raman activity to exist. How about vice versa.
A particular mode of vibration that does not change during vibration is ir inactive...other modes are ir active for molecules having centre of symmetry.
thanku so much......
2017 dec c part question
Sir, how are the last two coloumns of the character table filled,I always have to struggle while filling those coloumns
Sir,plz suggest
thanku so much sir
Do we need to memorize the table value containing 1-1......
Gate chemistry no I mean do we need to memorize all character tables.
thank you sir
thanks bhaiya
are you in IITB
Tnq sir
Thank you so much for this nice video, sir I write a mail to you but you didn't reply to my mail. plz tell me how to contact you??
Hello! Contribution for E is 3 always?
There are 3 Cartesian coordinates (x,y,z), on identity operation (E) they are unchanged. character for unshifted vector is 1. so 3*1=3
thq sir .nice class.
sir u have missed A double dash
Please solve examples
Contribution of dihedral plane
Thnk you sir...Make the last video lecture on group theory so that we review all your videos of this topic in order to start solving previous year problems....
ok sir...
What is the contribution for inversion of symmetry (i) ?
Sir please solve this problem...net CSIR 2016 set-c question-135
Thank you sir
Sir you are too good.
thank you sir
Thank you sir
thank you sir,
Thank you sir