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Introduction to infrared spectroscopy | Spectroscopy | Organic chemistry | Khan Academy
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- Опубліковано 4 сер 2024
- Basic principles of spectroscopy. Light absorption and bond vibration. Created by Jay.
Watch the next lesson: www.khanacademy.org/science/o...
Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules!
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Your videos are so detailed and helpful! I wished I found these videos sooner. 😩Thank you so much!! ♥️
Very lucid lecture! Thanks for the useful videos!
Even the first 14 seconds was very informative. Thank you
@scott Connor ...yes bro
yup
Yeah I hate those useless stupid intros that some use.
u r doing a great job
Fantastic lecture
Thank you so much sir for such a nice initiative taken by you🙂🙂 🙏. Your videos make learning very simple 🙏🙏
Thank you very much for this Amazing series of IR spectroscopy, Finally I can understand what is going on.
But the Uv/visible spectro was not as good as the IR,from a personal point of view.
Lastly, Huge Thanks from Deep of my heart for this spectacular Fruitful journey you took us through.
All the BEST Khan Academy. ❤️
Thank you! This course is very informative
Thank for the video, it was very impressive
IR made easy, can't thank you enough !
Thanks!
Thank you
very nice
superb...
Great one
sorry! what is the kind of the software that you use for writting in your lectures
Good
thanks a lot 💜💛💚💘❤💓💕💞💝💟💗💙
What separates the "fingerprint" area from the "diagnostic" one? Why is that wave number of 1500 not some arbitrary line? There are 3 dips in the curve to its left, and two to its right. But why the need for two zones. The teacher leaves this unclear.
ruffyatutube this is my guess - the wave numbers of groups (alakane, alkene, acid etc) are generally greater than 1500 (from a library of into available). Anything less than that is unique (like fingerprint) to each molecule. So 1500 is probably a good separation point identified from all the data available regarding wave number of groups.
Thanks
why is 1500 the boundary between diagnostic and fingerprint
sounds exactly like jackfilms at 2.12 and 2.35
how do you calculate number of infrared stretches for a metal carbonyl complex?
GREAT video but sound is VERY low.
Wavenumber is also proportional to the energy of the photons that the substance is absorbing.
How do you know what regions of the IR spectrum correspond to different bonds, such as double and triple?
+CLEMENTE PANTALEON Arreguin they have a characteristic wave number for their stretch
The lecture will be so good with explanation but this is so fast so it's just okk but explanation will so good 🙏🙏
Is the method to get this graph called FTIR or is that a different technique?
good video but i don't likee the convention of using v for frequency as it can be confused with speed for v = f lamda
+Karl Fischer Its not actually v, its a greek symbol called Mu , written like a curved v
Mehul Sharma *nu
Mu is the u with an extra line
I was going to say... f for frequency. Saves confusion with v for velocity.
Thanks a lot¡¡¡
how do i get that calculator program?
great. if you could use f, instead of v for frequency, it would be a lot less confusing. but amazing video
+Sayandeep Das v is very often used for frequency, this is something you'll run into a lot
Omg hey!!
looks like I'm not the only one in agreement that we have a shite chemistry teacher.
Legit was going say you here cos of
totally
thank you
what software did you use to make this video?
brazzers live
Khan use Smoothdraw iirc
why transmittance would be more than 100%?
Is speed ofd light not 3 x 10^8? why did you use 3 x 10 ^10 instead at 5:15
+Briste Belle 3x10^8 meter/second. He used 3x10^10 cm/s
Johnson L
Oh, thanks a lot
audio could be better
I thought v is wave energy and f is wave frequency?
Shadow destroyer nah v stands for frequency
To help clarify things: f is the symbol most commonly used for frequency, but nu (written as v) and omega (written as a curvy "w") are also symbols (greek letters) commonly used for frequency. Nu is used more often when specifying electromagnetic waves, such as light, X-rays, and gamma rays. In this example, the narrator is using nu (v), to indicate frequency and the same symbol with a tilde (wiggly line) above the letter, to indicate wave number. Nu does not actually look exactly like the letter "v" in the english alphabet, it looks and is handwritten a bit differently (please google it, if you like), and therein lies the common confusion between nu (meaning "frequency") and velocity, which takes the symbol "v" in formulae written as the letter appears in lowercase form in the english alphabet. :) I hope this helps. :)
You sound like KYR SP33DY
the video image is too poor, you need to fix it more
Video hay, mình tương tác nha
kyr sp33dy?
seriously the calculation in the middle was a big waste of time .... when people click on this video they want to know the general basics of everything dealing with IR spec...... like show us examples of how to identify groups and all that not some stupid calculation
That's rude, the calculation is the 'general basics of everything dealing with IR spec'. If you can't interpret the equations and see how it links in with the actual graph you're wasting your own time.
First 6 minutes was not necessary...
I thought speed of light is 3.00×10^8...
BECAUSE I'M BATMAN because you are batman 😀😀
BECAUSE I'M BATMAN 3x10^8 is meter/second whereas here he measured it in centimetre/secomd
LOLOLOL BEST REPLY EVER!!!
if the unit is cm/s=3.00×10^10 and if the unit is m/s=3.00×10^8
I wasted 10 min of my day on this video and i still know the same amount of info on IR that I knew before lol not much ..... cut the crap and get to the point ....not trying to be mean but i dont like wasting my time
His voice is so annoying