Wow, it took me a week to try to understand what a diastereomer was based on lecture notes, libretexts, etc but you explained it in 15 seconds with a definition that made SO much more sense. Thank you!
Thank you for the best miso soup!!! Its the best miso I had. I wish you could able to offer private tutoring! Your videos are helping me so much!!! Thank you so much!
fantastic explanation. i was sitting here spinning my wheels when it came to meso compounds and inversion points. your method of reflecting the molecule across a mirror and then rotating it 180 degrees prior to comparing it with its parent really clicked and has made this material painless. your visual explanation of inversion points was spot on as well. thanks.
i wish i had discovered your channel a couple years ago that would have been such a help. some of the things I never understood then I'm getting them now because of these videos thank you so much for your effort and your teaching is flawless!!!
For the example compound at 03:21, I think if you rotate along the C-C single bond, you'll find a conformation that gives you the desired plane of symmetry, hence achiral.
every time I had a nickel when I was confused by my professors and had to revisit this playlist I would quit college and comfortably live the rest of my life
Hi Dave! I have a question regarding the diastereomer part. My first question is - Why didn't you write -Br on the left side and -OH on the right in the mirror image of the molecule? And my second question is - Do the wedge bonds become dash bonds and vice versa in their respective mirror images? If yes, then, why? Thank you so much for the video! May God bless you!
+Sandy Oliva an enantiomer is the precise mirror image of a molecule, so all the stereocenters are inverted. epimers are diastereomers with more than one chiral center, but differ in only one of those chiral centers. so if a molecule is RRRR, its enantiomer is SSSS, but an epimer of RRRR can have only one S, the rest must remain R.
It seems so easy when u explain, while I was stressing so hard at school, tsym! but could u keep the camera fixed, the movement is distracting Edit: just realized this was 8yrs ago
hello sir,why should we rotate the compound 180 degrees and then placed it on the original compound? as i know we have to place the mirror image on the original compound.
i have a question tho..at around 5:15 you say that if we flip the mirror image ..so on flipping the mirror image,wouldnt the stereocentres also change like.. the comp had the centres in the orders R-S its mirror image would be S-R and on flipping in again , wouldnt it become R-S again..[otherwise the oh and br also wouldnt go into the plane so??]i dont get it nvm i was unaware of what the r and s actually meant and now its perfectly clear to me
Thank you! Question: when given only the Chemical's name, for example "phenylalanine", and asked to draw it 3D, how do you know which substiuent group lies in the same plane, which goes in front, and which goes in back?
I like this - it’s all very clear.... except for what did you mean by rotate 180 degrees at the beginning when discussing trans 1,2-dicholorocyclohexane? I can’t seem to see it (although I can see there is no plane of symmetry within the compound, making it not identical to its mirror image ). Did you mean flip it over ? rotate?
Professor Dave, in minute 1:25 (meso compound explanation), when we do rotate the molecule 180 degrees wouldn’t it have the chlorine atoms directed into the board (dash bond)?
yes but it's still the same molecule, the point is that you can rotate so that it is superposable, whereas the other one can't become superposable no matter how you rotate it
Hey Professor, at the beginning of the video, you showed enantiomers but the atoms pointong out were still pointing out in the mirror image. However, later in the video, while explaining diastereomers and showed the enantiomers, the atoms pointing outwards became inwards in the mirror images. Can you please explain?
Want more OChem help? Find me on Chemmunity: chemmunity.info/dave
Dave you beautiful wealth of knowledge. All of my tuition should go to you, you're better than my professor hands down.
i just wanna tell you u saved my life ..Thank u so much ..i had stereochemistry exam today and thanks to ur explanation i succeeded it
Wow, it took me a week to try to understand what a diastereomer was based on lecture notes, libretexts, etc but you explained it in 15 seconds with a definition that made SO much more sense. Thank you!
Are u in school or are you preparing for some exam?
@@knownstranger2570 yes lol I was. 4 years ago lmao
Thanks Dave, I'm studying for the mcat and these explanations you have are great and click so well when I'm reading the prep books.
so did u pass
How was your mcat
@@KoToKo90cHaN lol no reply 3 years from his comment.
Update? Dr yet?
@@lemickey4204 currently in residency : )
This is the best explanation of optical isomers I have seen so far :-)
You are the voice of the ORACLE of organic chemistry
I've been having a tough time understanding this off the bat and this video has cleared a lot of things up, thank you Professor Dave!
You make o-chem concepts very digestible! Great stuff professor dave!
You’re so good man. I wish the world had more teachers like you.
Where are you now???
your are the best professor
You are the Jesus of Ochem. Thank you so much!
No one compares to Jesus in anything
I'm studying for my chemical engineering board examination and your videos really helps me to review the chemistry concepts. :) Good job sir!
You are no doubt the best professor that exists.... According to me at least.......a big salute to you.
That was amazing, thank you so much! My orgo book never even mentioned the concept of an inversion center...
Studying for Mcat, thanks for clarification of diastereomers.
RT M u in med school?
Did u clear??
That was so good, You are a life savior!!! Thank you Dave!!!!
Thank you for the best miso soup!!! Its the best miso I had. I wish you could able to offer private tutoring! Your videos are helping me so much!!! Thank you so much!
This video is solid gold
i never knew that breakbot is also good at organic chem. anyway you da real mvp, greetings from Indonesia
fantastic explanation. i was sitting here spinning my wheels when it came to meso compounds and inversion points. your method of reflecting the molecule across a mirror and then rotating it 180 degrees prior to comparing it with its parent really clicked and has made this material painless. your visual explanation of inversion points was spot on as well. thanks.
not me watching these videos right before the exam
I don't have enough words to say how thankful I am to you professor Dave. Thank you very much ✨
Professor Dave, You are the best!
i wish i had discovered your channel a couple years ago that would have been such a help. some of the things I never understood then I'm getting them now because of these videos thank you so much for your effort and your teaching is flawless!!!
You are great at organic Dave sir
can i hug , u saved the ploblem in my head that my teacher coundnt solve, MUCHAS GRACIAS
Thank you 😊
Thank you for this, and thanks for captioning
Wow perfect ❤
SO CLEAR. you have the incredible gift of teaching and explaining
Thank you so much. You truly are a fantastic teacher, keep doing what you do!!
This is the video I was looking for, you save my life and probably my next organic chem exam :)
i love you i cant thank you enough after 2 years i get this!!
you make organic chemistry look so easy...thanks
where can i get more biomedical tutorials
check out my biochemistry series!
Thumbs up to Professor Dave👍, thank you
Totally came in clutch for an Oxford interview!
For the example compound at 03:21, I think if you rotate along the C-C single bond, you'll find a conformation that gives you the desired plane of symmetry, hence achiral.
by C-C I mean carbon-carbon
that's right, an inversion center is just another way of identifying it, but either way it's achiral!
every time I had a nickel when I was confused by my professors and had to revisit this playlist I would quit college and comfortably live the rest of my life
Beautifully explained, thank you!
I Am watching ur vedios from India, Ur explanation about this topic is be easy to understand thank you so much sir
Thank you so much for explaining this to me. Was confused, but now it's made clear. You sir, have saved me a lot of time and stress. THANK YOU!
Don't think you could've been any clearer, thank you!
Great for students like me who don't bother going their lectures. precise and comprehensive
Thank you so much, you're one of the best channels of chemistry I know. Thank you so much again.
I'm in love
+Nathalia Ferraz my great pleasure!
good
every day when I come home from school I watch one of these videos and I am always curious to what's new on the board at the beginning of hte video.
you explained this so well. thank you so much
Perfect explanation again.
thanks man
this helps a lot
I'm back again from grade 11 to grade 12👀
Thanks dude your explanations are always the best
Great prep for DAT
Subscribed, thank you so much it helped me a lot.
ive been trying to get that since my first year of medschool. thank you
show off lol
U r my lifesaver... Thank u sir.. 🙏🙏🙏 i was going mad due to confusions in this topic... 😂😂
Great lectures..never knew stereochemistry could get this easy
Kudos!
Are enantiomers as simple as mere mirror images Sir?
yes are non-superposable mirror images!
Thanks Professor Dave
You taught me all of my ochem knowledge.. THANK YOU
i love your lessons! thank you for helping me pass my exams
Fantastic explanation!
Thank you so much!
It's really helpful
and of course I subscribed your channel.^^
very helpful!! and quite easy to understand
Great video!
You are awesome 🦸♂️ my hero who saved me
wow! very nice explanation.
This helped a lot thank you!!!
You are a true master
wow you are amazing at explaining thank you so much!!
very helpful! thanks!
Hi Dave! I have a question regarding the diastereomer part. My first question is - Why didn't you write -Br on the left side and -OH on the right in the mirror image of the molecule? And my second question is - Do the wedge bonds become dash bonds and vice versa in their respective mirror images? If yes, then, why?
Thank you so much for the video! May God bless you!
we love u professor dave
Amazing vid!
you made my life easier
thank you for this video!! but I have a question what is the difference between an epimer and an enantiomer ?
+Sandy Oliva an enantiomer is the precise mirror image of a molecule, so all the stereocenters are inverted. epimers are diastereomers with more than one chiral center, but differ in only one of those chiral centers. so if a molecule is RRRR, its enantiomer is SSSS, but an epimer of RRRR can have only one S, the rest must remain R.
+Professor Dave Explains thanks a lot!!!!!!! :D
thanks a lot sir
Many concepts are clearing
It seems so easy when u explain, while I was stressing so hard at school, tsym!
but could u keep the camera fixed, the movement is distracting
Edit: just realized this was 8yrs ago
Thank You!
Many say this man saved them. Quite literally, he is chemistry Jesus.
Pls do video on optical activity
Why don't our teachers explain like this? Thanks bro
Wow amazing lesson 👍 now I anderstand the topic but please can you put some few questions in the end of the lesson for us !?! 🙏
hello sir,why should we rotate the compound 180 degrees and then placed it on the original compound?
as i know we have to place the mirror image on the original compound.
we just have to rotate it or flip it in some way so as to try to align all the atoms in the two molecules, whatever method you use is fine.
Thank you so so much!!
Dude thanks, just thanks🙏
i have a question tho..at around 5:15 you say that if we flip the mirror image ..so on flipping the mirror image,wouldnt the stereocentres also change like..
the comp had the centres in the orders R-S
its mirror image would be S-R
and on flipping in again , wouldnt it become R-S again..[otherwise the oh and br also wouldnt go into the plane so??]i dont get it
nvm i was unaware of what the r and s actually meant and now its perfectly clear to me
Thank you! Question: when given only the Chemical's name, for example "phenylalanine", and asked to draw it 3D, how do you know which substiuent group lies in the same plane, which goes in front, and which goes in back?
Thank you so much 🙂
You are the best👌
Really thank youu
Please explain in presentation method which we will understand more easily and take more and more examples .
you explained it perfectly! Thank you!!!!! :)
Thank you.
Thank you professor dave .I want to know how to know How many stereoisomer present of a compound 🙏🏻
thank you for that great video! is there a tutorial for the gabriel synthesis?
i don't actually, but i'll put it on the list!
that would be really helpful! thank u so much :)
I like this - it’s all very clear.... except for what did you mean by rotate 180 degrees at the beginning when discussing trans 1,2-dicholorocyclohexane? I can’t seem to see it (although I can see there is no plane of symmetry within the compound, making it not identical to its mirror image ). Did you mean flip it over ? rotate?
great sir
Professor Dave, in minute 1:25 (meso compound explanation), when we do rotate the molecule 180 degrees wouldn’t it have the chlorine atoms directed into the board (dash bond)?
yes but it's still the same molecule, the point is that you can rotate so that it is superposable, whereas the other one can't become superposable no matter how you rotate it
thank you!!!!
Thank you Dave! I'm an Italian chemistry teacher and I love your videos... I'm trying to make my pupils to learn stereochemistry in English 🙈😊
very cool! i would suggest my new italian tutorials as well but they are probably the last ones who need that :)
Good
Hey Professor, at the beginning of the video, you showed enantiomers but the atoms pointong out were still pointing out in the mirror image. However, later in the video, while explaining diastereomers and showed the enantiomers, the atoms pointing outwards became inwards in the mirror images. Can you please explain?