13. Molecular Orbital Theory
Вставка
- Опубліковано 14 лип 2024
- MIT 5.111 Principles of Chemical Science, Fall 2014
View the complete course: ocw.mit.edu/5-111F14
Instructor: Catherine Drennan
Why do some atoms readily form bonds with each other and other atoms don’t? Using molecular orbital theory, we can rationalize why molecular hydrogen is an abundant molecule whereas molecular helium is not. If you want to power your starship with dilithium crystals, you should watch this lecture.
License: Creative Commons BY-NC-SA
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Thank you so much, Catherine. You've become one of the best chemistry lecturers I've ever witnessed. Great explanations!
Catherine Drennan you are literally my saviour! I wish my professor taught things with the same level of explanation and passion as you!
Here Pi on t shirt is not from maths, it's chemistry
it's almost impossible to not to understand her. Thanks, for such a great video!!!
these courses are life saving
thank you MIT
Professor Catherine thank you for this awesome class. I understand alot now
actually in PH3 hybridisation is negligible because of drago's rule so the angle should be approximately 90 degrees
soap 7 hello Soap 7, could you explain, in case of nitrogen, which sigma bond will be counted either from 2s or 2pz, and lone pair comes from where? Thank in advance
@@mossammadu.c.sultana8548 well NH3 undergoes hybridization unlike it's other members of group 15. It is explained by drago's rule. And it has a lone pair because nitrogen has 5 valence electrons out of which the vacant p orbitals form hybrids with Hydrogen s orbital. The two paired electrons are lone pair.
The lecture is really good and deeply understandable. Thank you Ma'am.
Lucidly explained. Thankyou, Catherine!
Thank you for the refresher on MOT!
Thank you! It was great to see this!
1:01:41 aí a prof realmente se empolgou, e com razão. Isso é paixão. admirável. Meus parabens.
ழுஜுவோஞமழாவுஸ ழுமுபஜு த ழழூஜா. ஐமுழஜேஜே
brilliantly explained, all of it
Thank you so much, Catherine
best explaination, you must have a happy class with exciting comphrehension. you saved my time and i will follow up on your videos as they are much effective
in learning and comphrehension.. thank you so very much
Such a great teacher. Wish i got a teacher like u... Great explanation
Thank you! I cannot believe it took me just this video to understand this theory.
Thank you MIT , really helped me understand MO Theory basics
This video is amazing thank you so much Catherine ma'm......,.......
Thank you, I did not understood this theory very well in class, and your explanation made total sense to me now
Thank you so much Catherine
She Rocks!!
This is such an amazing lecture. Truly fabulous at what she does! Thank you.
professor thank you so much and for MIT also!
Thanks a lot prof!
You're the best
I wish I were in the class all the above in MIT😶🔥🔥🔥🔥🔥
Wow, a crystal clear lecture !!!
Thank you! very helpful
Thank you so much this saved me
Ma'am, you are great. Thank you MIT Opencourseware , thank you ma'am. THIS VIDEO IS LIFE SAVER ❤️💯💯
Thank you SO MUCH :D
Thnxs a lot ma'am for the wonderful lecture
Thanks Catherine.
much love
this is really legit. first time I have ever understood this
Thank you ma'am.. I love you for this.may God bless you.
MY LIFE'S BEST EXPLANATION OF PI ORBITAL IN MOT!
Thanks a lot.... It has a great content.... Thanks once again😀😀
Best lecture of my life
I'm in year 12 right now (UK) and the fact that I can understand this (even though it's beyond Alevel) shows just how good she is as a lecturer!! I wish I had teachers like her!
Hi
How are you!
Man, our education system sucks, in India these are taught to year 11.
@@akshat_shukla00 why tf it sucks on the fact that it was taught in 11th?
I am an indian too but we indians just try to drag this thing everywhere that our education system sucks even if its not even the context of ongoing discussion.
I know its sucks but dragging it everywhere wouldnt help either.
@@binodtharu8348 eh, I made that comment 8 months ago, don't get worked up
the second half is amazing
Thank you!
in the formation of MOs, it looks like a chanced base whether it will be the bonding type or antibonding type
than at the energy scale why it seems that both BMOs and ABMOs are being formed at the same time.
helpful lessons
good stuff
Thank you very much.
In Ph3 bond angle is 90' as sp mixing is negligible because d orbitals can't be contracted because surrounding atom has less electrongativity so there are 3 p pure orbitals which are perpendicular to each other .
Its really helpful
It has helped me in grasping concepts of (LCOA)
I am very thankful to both MIT and madam who delivered this lecture
Very nice lecture.
God of inorganic vj sir...
thank you
I would like to know more about wave functions
This is great 👍
All the way from India...loved the class!
This is really helpful..... I was struggling with the concept of molecular orbitals....all of my doubts are clear now...thank you....
Doesn't PH3 have bond angle close to 90 degree as it has unhybridized pure p orbitals?
Yep
yes thats also what i thought same goes for SH2
Nope Tetrahedral have angle 109.4 and due to a lone pair in PH3 bondpairs come closer
Right. I was thinking the same.
Yes dragos rule
Thanks 🌹
Great!
The answer to PH3 should be about 90° because it is a Dragos Molecule; doesn't undergo hybridization and has a lone pair as well.
Yes absolutely is should be 93°
Exactly!! I was searching for this and was surprised that there is only one comment!!!
Life saver, she is :)
It's great to watch the lecture after studying the topic.
Really helpful...
Grateful I m
Thanks alot madam thats enough for my first semester exam
When i was low on fuel i reconstruced the electrical engeneering wireing to absorb friction electronics gathering of power into the batteries Nd recycle the spent fuel aboard the ship
Can u please explain why sigma 2p orbital energy varies with atomic number,and how did u compare energy between sigma 2p and pi 2p
thks a lot...very helping love from india
Thanks a bunch no no no thank a billion 🙏.
It was wonderfully helpful.
Thnks man,
Thank u so much mam
very good
In ph3 drago rule is operated which 3rd period and above periods of p blocks elements does not undergo hybridization when connected with less electronegative element like hydrogen!!
Yeah and the *bond angles* should be ≈90° not
Thank u soooooo much🤗🤗🤗
Nice lecture mam
When drawing a diatomic compound with different heteroatoms, electronegativity would indicate the energy levels in which the AOs lie.
4:44 listen to this statement this statement changed a big misconception of mine which was there with me for years, I suggest this highly if you are a jee aspirant
When positive parts of wave have been used to form the bonding orbital, now where positive part is left to form anti bonding orbital
Either we should speak positive and positive will make bonding and negative negative will form antibodies or we should speak either there will be bonding or there will be antibonding
Please share some assignment links .
And the lectute was very good.
(13:15) won't spin be the overriding factor as to whether a covalent bond forms ?? the spin magnetic moment between the two electons wanting to align the spins (up - down) will be way higher than the orbital magnetic moment around the nucleus or won't it ?? wish the professor would explain the reason
This is amazing! Is there a continuation of this lecture or another lecture maybe, explaining poliatomic orbital theory, molecular term symbols, point groups maybe and their relation to degeneracy???? PLissss
There is a playlist of these series, check em out :)
In the description
Thanks to MIT. Thanks to professor Catherine.
More videos!
I think the bond angles in ph3 should be 93 deegrees each ,as a consequence of Drago's rule.
well i think the bond angle would be greater than 90 but near to it and only option it would fit would be angle less then 109 so i think that's why it was the correct answer
Tnx
Why she didn't explained about the type of nodes in ABMO ? I thought there'll be more description about the nodes ( like their names etc )
"A half, it's always a half."
It's stuck to my brain now 😂
U know how to make students understand
Nice
Very well explained 😊😊😊🙂🙂🙂
It is fucking awesome that you need quantum mechanics to properly explain why hydrogen forms H2.
Well I wanted to learn about The Molecular orbital Diagram of N2 ²-
Had a doubt wether your eating the pie trick will work here ? Or it is different ?.
45:29 eu senti essa referência, minha ex-namorada disse o mesmo :´( mas a piada foi boa, excelente aula.
Love this. Great primer on MOT. Makes it look so simple. Could have done with Jack Griffin at 46:40 “Alright everybody, let’s go ahead and start to shut up now. Let’s go ahead and, ah, start to settle into your seats and, ah, begin shutting your mouths”
With reference to the clicker question , wouldn't the angle be 90 degrees because the p atom would remain unhybridized as per drago's rule?
Mam, your lecture was awesome. Please let me know from where did you get the info regarding He 2 existence.
It is well known and studied in lab.
What if there's multiple of the same atom type (like a ton of Mg) in a lattice? How do they interact based on MO?
I love your t shirts
why do them orbitals create both constructive and destructive interference?
thanks for answering
One thing I don't understand and not found anywhere till now is how bonding and antibonding molecular orbitals can form simultaneously i e if we are linearly combining and atomic orbitals they can either combine constructively or destructively how both of them are happening together? I e why do we consider all the POSSIBLE COMBINATIONS only one of them can happen not both.
explains what an entire chapter of my textbook barely does
THE FIRST QUESTION WHERE THE ANGLE CAME OUT TO BE 109.5 HOWEVER THE COMPOUND IS DRAGO COMPOUND SO IT ANGLE QOULD BE 90 +_ 5 DEGREES
Best😌❤