Those who are eager to learn will not be bothered by frivolous things like sound quality. Your presentation was crystal clear and helped us learn the concepts of symmetry applications in IR and Raman spectroscopy. Thank you so much!
Yes, I know the microphone was too close. The university only bought me a headset microphone to use. That was all I had to go with. Assistant profs aren't rich, and California is expensive. I recorded these mainly for my class, but made them public at the request of several friends. So please be kind with the comments. I am a person with feelings. They have done more good helping people learn than they have annoyed people with my voice. If they really bother you that much, you can pay me to fix it. LOL
sorry to be off topic but does anyone know of a method to log back into an instagram account? I was stupid lost the login password. I would love any tricks you can offer me!
the mic was perfect wdym? no one is complaining and you dont have to explain yourself in any way, this video was really great! if someone doesnt like this video, they can sincerely fuck off and watch some other video, you did a great job here.
Hi, there! I am currently in grad school for chemistry, and I just want you to know that I sincerely appreciate the video. It helped a lot, and I am so sorry about the terrible comments. Professors and teachers don't receive enough recognition for what they have to do with the little they have. Thank you so much and have a good one!
This video helped me a lot! Thank you so much! My professor is not instructing us whatsoever and is just giving us data. Granted it is a lab course, but the other lecture course has not covered this material. This walks through everything very nicely!
Great video! Could you please explain to me why the B1 mode is not IR active? It is associated with the linear function "x" in the C2V point group character Table so it should be IR active I would have thought.
Hi everyone, I need help. For sources like symmetry-obbertein, they find xz plane's value is 3 and yz value is 1. I did this method to 1,1 difluoromethylene but in these sites, they also changed xz plane's value with yz plane. Which one is true? This method is logical. I couldn't understand.
Thank you so much for your wonderful explanation! It's crystal clear. Do you know whether the same analysis could be applied to crystals rather than the simple molecule here? Thank you.
When you calculate the irreducible representation for a different operation than C2, for example, C3 operation. Since it only rotates 60 degrees, do we count it as 1, -1 or 0?
You are most welcome. I believe in God and his son, Jesus Christ. I do my best to honor him and help others. And when I screw up, I am grateful for his grace. :-)
Hi Melissa, (On the last slide) I am not quite clear on what "Contribution per atom" implies (and therefore couldn't figure how those numbers were assigned for that line). Can you please shed some lights there?
Thank you for the video. Maybe I haven't been listening close enough, but one question remains: You stated, the convention is that the highest fold axis of symmetry is aligned with the z-axis, while the x-axis is perpendicular to the plane of the molecules. In the example of the water-molecule, this would give us two options for the x-axis. Either it points into the "paper"-plane or out of it. In your case it points into the plane, which poses a left-handed coordinate system, if I am not mistaking. Is there a reason why to prefere a left-handed-system? It puzzles me, because in the most cases I was told to prefer a right-handed-system. Thanks ahead
The order is only given by the number of classes when each class has only one element, which only occurs for Abelian groups. In general one needs to write down the order/cardinality of each class as well.
Those who are eager to learn will not be bothered by frivolous things like sound quality. Your presentation was crystal clear and helped us learn the concepts of symmetry applications in IR and Raman spectroscopy. Thank you so much!
im eager to learn but im also autistic and the constant smacking of the lips physically hurts me
Okay I know there's mouth sounds but come on who's disliking this? The woman made a half hour video not skipping a single detail
Yes, I know the microphone was too close. The university only bought me a headset microphone to use. That was all I had to go with. Assistant profs aren't rich, and California is expensive. I recorded these mainly for my class, but made them public at the request of several friends. So please be kind with the comments. I am a person with feelings. They have done more good helping people learn than they have annoyed people with my voice. If they really bother you that much, you can pay me to fix it. LOL
sorry to be off topic but does anyone know of a method to log back into an instagram account?
I was stupid lost the login password. I would love any tricks you can offer me!
the mic was perfect wdym? no one is complaining and you dont have to explain yourself in any way, this video was really great! if someone doesnt like this video, they can sincerely fuck off and watch some other video, you did a great job here.
Thank your for share your knowledge Professor.
A teacher is annoyed and she had to appologies for dumb things. Are you civilized guys?
Ty for your videos!
Hi, there! I am currently in grad school for chemistry, and I just want you to know that I sincerely appreciate the video. It helped a lot, and I am so sorry about the terrible comments. Professors and teachers don't receive enough recognition for what they have to do with the little they have. Thank you so much and have a good one!
I love how this video leaves no obscure symbol/notation thing untouched and explains why things are the way they are.
Excellent work.
Thank you so much! I watched this yesterday and today was the exam. I got the whole question right!!! 24 points just because of you. thanks again.
You are so welcome! I am glad that helped. I know when I was in grad school this was really difficult for me.
Thank you, this is one of the greatest video about how to use character table.
I was searching for this video from so long . Thank you very much
This video was very well done. I have learned a lot. Thank you very much for your time and effort in providing this informative and captivating video.
Wonderful video! This is a super clear explanation of the basis of group theory!
Thank you very much. This is definitely the best video I have seen on this topic.
This video helped me a lot! Thank you so much! My professor is not instructing us whatsoever and is just giving us data. Granted it is a lab course, but the other lecture course has not covered this material. This walks through everything very nicely!
Thank you so much for uploading this video! You helped me understand the relationship between irreducible representations and raman & IR spectrum.
These videos were so useful that I managed to ignore the sounds coming from your mouth.
thank you so much !!!! i have been looking for a video that could make me understand this and i finally found it , thank u thank u thank uuu
Thank you for your material course :) I love you
thanks for this info, its really helpful. you dive into details my symmetry class skipped. cheers!
You are incredible!!
This is a very conceptual one for the point group symmetry...Thank you for this tutorial...
Thank for very much, this video will be my personal Bible for the rest of the unit.
Good presentation. Thank you for publishing it for the benefit of many.
Thank you for this amazing video!! I learned a lot!! Thankss!!!!!
This has been so helpful! Thank you!
best video which clearly explain red and ired rep as well as the active vibrational modes....thnkuuuuu so muchhh
a lots of lots of thanks to U.
It is very useful vidieo.
thanks again.
Great thanks to you it s absolutely an good video to understand how characterabels are made of and how to work with them.
Thanks allot for the explanation it really helped me understand the topic much better!
it was clear as crystal. thank you
Extremely helpful, thank you
Thank you! This helped immensely =)
Thank you very much. Very nice explanation !!
Very good work Melissa.
Thanks so much!
This is a great vdo. Thank you for sharing.
this is awsome!
Thanks a Bunch........!! Great Video Tutoring.......!!
this is a great video
Thank you so much!!!!
The video was informative. But please move the microphone further from your mouth. lol
Great video! Could you please explain to me why the B1 mode is not IR active? It is associated with the linear function "x" in the C2V point group character Table so it should be IR active I would have thought.
Very detailed. Thank you
I enjoyed the learning process.
u r great
Shouldn't the identity column be -1 for B/antisymmetric at 4:20 ?
thank you :)
life saver, thx :)
Thank you so much :)
1:40 captial gamma, not lambda
Can't listen to this but it's informative!
can you post video for complex molecules!
Hi everyone, I need help. For sources like symmetry-obbertein, they find xz plane's value is 3 and yz value is 1. I did this method to 1,1 difluoromethylene but in these sites, they also changed xz plane's value with yz plane. Which one is true? This method is logical. I couldn't understand.
Thank you!
Thank you very much ❤
thanks for real lesson, thanks a lot
Ma'am, Thank you so much for this video 🙏
Thank you so much for your wonderful explanation! It's crystal clear. Do you know whether the same analysis could be applied to crystals rather than the simple molecule here? Thank you.
When you calculate the irreducible representation for a different operation than C2, for example, C3 operation. Since it only rotates 60 degrees, do we count it as 1, -1 or 0?
That is where you would use the cos (360/n); thus the Cos (360/60) = cos 6
Grazie mille
This helped me go from completely confused and clueless to knowing it all. You saved me. Thank you 🥹
Thank you so much
Link for previous video?
I can't thank you enough. Thank God or whatever you believe in or not, there are people like you who chose to help others.
You are most welcome. I believe in God and his son, Jesus Christ. I do my best to honor him and help others. And when I screw up, I am grateful for his grace. :-)
Yeah, I loved this video! But the microphone is WAY to close, it's very distracting.
It is really very helpful. Thank you mam
please do this with SO3 molucule
pleaseeeeee
Hi Melissa, (On the last slide) I am not quite clear on what "Contribution per atom" implies (and therefore couldn't figure how those numbers were assigned for that line). Can you please shed some lights there?
+1 +1 -1 for every atom. for example by using xz sigma ve signifis x and z +1 and y -1 thats why the contribution is +1
Great 🙂
Is it possible to get fractional and negative numbers in irreducible representations?
If you do, it means it means there was an error made somewhere.
very good explanation mam.
Nice explanation
It's really helpful vedio, thanks so much.
To overcome unwanted voice, make it 1.5 X speed.
thank you, great tutorial. I recommend viewers to watch in 1.25 or 1.5 speed, otherwise you may sleep :)
Comment on fait pour déterminer les fonctions
holy fuck, that is a good class indeed
Thaaaank u
Thank you for the video.
Maybe I haven't been listening close enough, but one question remains:
You stated, the convention is that the highest fold axis of symmetry is aligned with the z-axis, while the x-axis is perpendicular to the plane of the molecules. In the example of the water-molecule, this would give us two options for the x-axis. Either it points into the "paper"-plane or out of it. In your case it points into the plane, which poses a left-handed coordinate system, if I am not mistaking. Is there a reason why to prefere a left-handed-system? It puzzles me, because in the most cases I was told to prefer a right-handed-system.
Thanks ahead
Thank you for sharing this video, it was clearly explained and very informative :D
Thank you.useful in the vedio my study
Good 👍
Cannot help to leave a comment. In 8:25, it says Ramen active. :O
The order is only given by the number of classes when each class has only one element, which only occurs for Abelian groups. In general one needs to write down the order/cardinality of each class as well.
Г is capital Gamma. The capital Lambda is like A without horizontal line
This presentation is just all over the place...
thank you so much Madam.
"Polarization equals measure of ease": proof anybody can post on any topic even if they have no idea what they are talking about.
"gerade" xD
you know the song how to save a life? cause you just did
can u please drink a glass of water?
Me, an undergrad seeing that grad students learn this :/
ramAn but not ramEn
so much tongue in this video. I'm not sure if it's more parts seductive or more parts scary.
HAHAHA
I am Ukrainian-Canadian and I love your picture ^_*
fuck off dude she's making free educational videos on RUclips
How I want to be there with this girl to tell her that you can do it, dont worry, it's okay, take your time
asmr meets science
All these people commenting about her mouth have never heard of ASMR...
Hahaha, true lol
watch it at 1.5x speed, less spit more chem
k never mind it's getting worse
My ears got raped!
You lag alot during speaking mate, also what is up with your mouth??