God bless you honestly. i have never understood these concepts with such clarity as someone who has been struggling through two years of ochem, but here you are like a divine gift. thank you for all you do!
just wanna say that ur videos have been super helpful for me while taking o-chem over the summer! chem is one of my weaker subjects and watching ur videos always helps out tons and u teach in a way that allows me to undestand the subject well and pick great examples. thank you for what u are doing!
Chad you actually make science so enjoyable! I was so nervous going into o-chem this semester but ever since I found your channel I've been falling in love with the subject and how you explain things so nicely! Super grateful
You are the best teacher I have ever had. You are truly a blessing. I've made A's in all my gen chem and gen physics classes because of you. I'm sure I'll be able to do the same in ochem this summer with your help. Thank you so much!!!!
I have learned alot about isomers from your first two videos and I thought I should comment because You are an awesome teacher you explain everything clearly. Thank you for coming up with chads prep it has helped me a lot! you make me want to pursue a career in chemistry keep this up its excellent!
Thanks dear sir Chad, your lecture helping me alot.i,m studying in Italian language but i can,t understand my professors lecture well due to language barrier. your lecture help me alot
I got lots of wrong answers not understanding the effect of Hydrogen’s position with just reading my laboratory manual. I should have watched this video. This just made stereochemistry easier to understand.
Hi, if you are working backwards and are given the name first with an R and S then asked to draw the skeletal structure. How do you know which elements around the chiral carbon get the wedge the line and the dash? For example, if it was a hydrogen a bromine a methyl and an ethyl, which of the four gets the wedge, dash or line. Many thanks for your time
In a bond line structure a tetrahedral atom is drawn having 2 bonds in the plane, 1 wedge, and 1 dash. So see which bond isn't drawn yet, and that is the type the unseen hydrogen atom must have. Hope this helps!
Hi Chad! I have a question. So at 18:29, for the second example we are looking at, is it *necessary* to go label all of the C's and H's? Since we know the C on the right has a longer carbon chain, is it okay to just assume that that would be ranked above the one on the left?
EXCELLENT!!!! This is *extremely* helpful!! Just curious, is it normal for someone to cover all of chapter 5 in this series in a week (all of stereochemistry)? Or teach IUPAC nomenclature all in one lecture?
Hi Rohit! The carbon under the oxygen is sp2 hybridized and trigonal planar. As such it is only bonded to 3 atoms. Only sp3 hybridized, tetrahedral atoms have a chance of being chiral centers. Hope this helps!
I’ll never learn ochem, I just fucking hate it with a passion. Like they go out of their way to make it complicated. In physics they just do clockwise negative counterclockwise positive. In ochem they have to look at it 5 different ways and pick the worst way to look at it and then categorize it that way
Are you feeling better about Ochem now? I know it's been like 8 months since this post but I hope you were able to learn the material and understand it
At 16:15 why is it that you count SH as S H H instead of H H as it should be bonded. When you look at the substituent groups and what it's bonded to, you write what it's bonded to and not the group itself. Say for the first example you say O O O instead of C O O, not counting the carbon? My big question is why you are comparing S to O's when you should automatically declare S as first priority automatically as it should be compared to carbons, not the oxygen it's attached to.
@@ChadsPrep It is when you're assigning R and S configurations. For the molecule on the very left, you are comparing S with O. However, S is directly connected to the chiral carbon while the O is connected to the carbon CONNECTED to the chiral carbon.
Ah got you - it is for the previous example around the 13:00 min mark correct? The chiral carbon is the one marked with a star, so the CH2(SH) is one group and COOH is another, both S and O are one carbon away from that starred chiral carbon if you go back and check
So, when you say 4 different groups- CH2 and CH3 are different, even though they are both carbon? (I would say they are different) If so, does this mean a chiral center cannot be double bonded?
Hi again Vladimyr! Yes, 4 different groups need not mean four different atoms. A carbon bonded to methyl group, an ethyl group, a propyl group, and a butyl group would be a chiral center. And a chiral center must be tetrahedral (and therefore sp3 hybridized) so a carbon with a double bond could not be a chiral center. Hope this helps!
pls don't jump my comment I really need help for my assignment. my question is if we got two chiral and they have the same designation that means both r or s how can we rename it? 2.if we are asked to put the relation after we assign r or s and if we ger 2R,3R and the same for the second one what is the answer us it diastereomers or enatiometric? pls give me answer I am your subscriber and follower
1. Whether both chiral centers have the some configuration or different configurations, you would still list the designation with the carbon number at the beginning of the name [ex. (2R, 3R)- or (2S, 3S)- or (2R, 3S) or (2S, 3R)]. 2. Also, if the two structures your are comparing have the same bond connectivity, then they are either identical or some form of stereoisomer. If their chiral centers are in the same configurations, then they are identical. If all their chiral centers are in the exact opposite configurations, then they are enantiomers. If some of their chiral centers are in the same configuration, and some are in the opposite configuration, then they are diastereomers. I go over this last part in the very next lesson in the playlist 😊
You really deserve so much more recognition!! Your videos are amazing and never fail to help. Please keep doing what you're doing!
Thank you for your comment and praise, Alexander.
God bless you honestly. i have never understood these concepts with such clarity as someone who has been struggling through two years of ochem, but here you are like a divine gift. thank you for all you do!
You're welcome - Happy Studying!
"Or if you just feel sorry for short bald guys" LOL! Thank you for uploading these videos Chad, you make chemistry so easy to understand!
You're welcome and Thank You!
just wanna say that ur videos have been super helpful for me while taking o-chem over the summer! chem is one of my weaker subjects and watching ur videos always helps out tons and u teach in a way that allows me to undestand the subject well and pick great examples. thank you for what u are doing!
Chad you actually make science so enjoyable! I was so nervous going into o-chem this semester but ever since I found your channel I've been falling in love with the subject and how you explain things so nicely! Super grateful
Thank you, Sara - and good luck with your ochem - glad you are finding the videos so helpful!
currently taking o-chem and your videos are so helpful! thank you
Glad you found us, Danait - good luck with o-chem and your studies!
you made me understand all the ochem topics in a week😭❤️ THANK YOU SO MUCH!!!!
Glad I could help!
You are the best teacher I have ever had. You are truly a blessing. I've made A's in all my gen chem and gen physics classes because of you. I'm sure I'll be able to do the same in ochem this summer with your help. Thank you so much!!!!
That is fantastic, Chloe - keep up the good work!
You're a great teacher. I hope you are aware of all the good that you do. I hope you acquire everything you deserve 😊
Thanks - always appreciate the kind words.
That 2nd example was such a good one! Thanks!
Glad you liked it!
Thanks, this makes a lot more sense now. Glad u can also admit that profs often give much more challenging questions on exams than in practice.
You're welcome and Thank You.
Thank you so much understood this concept after so much struggle!🙂🙏
You're very welcome.
I have learned alot about isomers from your first two videos and I thought I should comment because You are an awesome teacher you explain everything clearly. Thank you for coming up with chads prep it has helped me a lot! you make me want to pursue a career in chemistry keep this up its excellent!
Thank you for saying so, fana jafer.
Thank you so much! You explained this concept in such an easy to understand way!
You're welcome and Thank You.
This was such a great video! Made it so easy to understand, love this Organic Chemistry Playlist! :D
Glad you found us!
Studying for my DAT right now, I forgot how to do configurations and this is a life saver. Thank you so much!
Yoou're welcome - Happy Studying and hope you do well on your DAT.
Thank you so much. You're helping out a lot of students including me. Please keep doing what you're doing.
You're welcome - Thank You.
Excellent! Thank you. The best explanation, anywhere. You are the best!
You're welcome - Thank you!
awesome Chad can not tell you how much you made my life easier thanks
You're welcome - Glad to hear it!
Thanks dear sir Chad, your lecture helping me alot.i,m studying in Italian language but i can,t understand my professors lecture well due to language barrier. your lecture help me alot
Glad the channel is helping you!
Your videos are a great supplement to my course. Thanks!
You're welcome Joey! Glad you're finding them helpful!
Three years later and this helped me out ❤,thanks so much
You're very welcome - glad it did!
that latin lesson at 3:30 led me to an interesting rabbit hole of etymology
I hope you enjoyed it :)
you are my favorite ochem teacher tHANK YOU
You're welcome and Thank You!
12:22 "Ooo"
Me when I learn new things cause u da bomb at explaining!
I see what you did there! I had to go back and look to see what you were referring to. Glad you found this lesson helpful!😉
Thank you very much for your explanation and good examples 👍
You are welcome and Thank You!
Thank you!! you explained this so well
You're welcome and Thank You.
Thank you so much! I always struggled with this and got confused but now I understand it perfectly!
Glad to hear it - Happy Studying!
I don't know which course you are teaching but it is extremely similar to my jee mains syllabus
Great explanation btw
Glad to hear that! Happy studying! :)
Chad thank you so much :) THANK YOU THANK YOU THANK YOU!!!!
You're welcome - You're welcome - You're welcome!
I got lots of wrong answers not understanding the effect of Hydrogen’s position with just reading my laboratory manual. I should have watched this video. This just made stereochemistry easier to understand.
Glad it helped - Happy Studying!
thank you so much, this really helped me a lot, I came here clueless.
Glad you found us!
You are amazing.. Thankyou so much Sir❤
Love from Pakistan❤
Thank you from USA - Happy Studying!
You help us very much sir
Glad to hear it
Hi, if you are working backwards and are given the name first with an R and S then asked to draw the skeletal structure. How do you know which elements around the chiral carbon get the wedge the line and the dash? For example, if it was a hydrogen a bromine a methyl and an ethyl, which of the four gets the wedge, dash or line. Many thanks for your time
Thank you. You are indeed a great teacher.
You're welcome and Thank You.
I😊 could not understand this in class but i got the concept now! thank you !
You're welcome!
Could you please make a playlist on E/Z isomerism? I noticed you did not cover that topic and also compare it with cis/trans and R/s pls.
Hey Saimoon - check this video out: czcams.com/video/GshKARH9WL4/video.html
How do you know that the lowest priority is going away or towards you
Chad, you are a lifesaver!! I do have one question: how do you know if an unseen H is on a dash or wedge? Thanks in advance!
In a bond line structure a tetrahedral atom is drawn having 2 bonds in the plane, 1 wedge, and 1 dash. So see which bond isn't drawn yet, and that is the type the unseen hydrogen atom must have. Hope this helps!
I totally left a like because I feel bad for bald guys lol. THANK YOU CHAD!
HA! You are welcome, Elissa.
Thanks 👍 sir continue with the good work 💗🙏 I appreciate your work
You're welcome and Thank You!
As always, thank you so much!
You are welcome, Timothy!
Thank you so much sir
Most welcome.
I don't usually comment but, this video was very helpful thank you so much :)
Glad to hear it, Zohaa Sethi!
GOD BLESS YOU
Thank you - to you as well.
I hope you have a patreon channel or something where we can donate/....amazing job
Hi Chad! I have a question. So at 18:29, for the second example we are looking at, is it *necessary* to go label all of the C's and H's? Since we know the C on the right has a longer carbon chain, is it okay to just assume that that would be ranked above the one on the left?
i really needed this, thank youuuuuuuuuu
Glad the channel is helping you, B!
Shit man, thank you. You're so clear and concise
You're welcome!
Very powerful brother
Thanks!
Thnuh so much sir ❤🎉😭😭😭😭
You are welcome - Happy Studying!
EXCELLENT!!!! This is *extremely* helpful!! Just curious, is it normal for someone to cover all of chapter 5 in this series in a week (all of stereochemistry)? Or teach IUPAC nomenclature all in one lecture?
oh man.. thats a whole process
Practice makes it easier I promise :)
Hi Chad! I was wondering if you had any study guides for this chapter like you used to in your prior in-person review sessions! Thanks so much
Hi Chad,
At 10:48, how come there is only 1 chiral center? Would the Carbon under the O double bond not count as another carbon center?
Hi Rohit! The carbon under the oxygen is sp2 hybridized and trigonal planar. As such it is only bonded to 3 atoms. Only sp3 hybridized, tetrahedral atoms have a chance of being chiral centers. Hope this helps!
You're the man!
Woo Hoo! Thanks, Rohan!
🥺🫀please make more videos on this topic
Special do some practice question this was really helpful 🎉❤
How do you do that when H is on the Planar
I’ll never learn ochem, I just fucking hate it with a passion. Like they go out of their way to make it complicated. In physics they just do clockwise negative counterclockwise positive. In ochem they have to look at it 5 different ways and pick the worst way to look at it and then categorize it that way
I totally get how confusing it can be, stick at it! You got this :)
Are you feeling better about Ochem now? I know it's been like 8 months since this post but I hope you were able to learn the material and understand it
At 16:15 why is it that you count SH as S H H instead of H H as it should be bonded. When you look at the substituent groups and what it's bonded to, you write what it's bonded to and not the group itself. Say for the first example you say O O O instead of C O O, not counting the carbon?
My big question is why you are comparing S to O's when you should automatically declare S as first priority automatically as it should be compared to carbons, not the oxygen it's attached to.
I'm not sure I understand this question as there is no S at this point in the video. Do you mean carbon?
@@ChadsPrep It is when you're assigning R and S configurations. For the molecule on the very left, you are comparing S with O. However, S is directly connected to the chiral carbon while the O is connected to the carbon CONNECTED to the chiral carbon.
Ah got you - it is for the previous example around the 13:00 min mark correct? The chiral carbon is the one marked with a star, so the CH2(SH) is one group and COOH is another, both S and O are one carbon away from that starred chiral carbon if you go back and check
So, when you say 4 different groups- CH2 and CH3 are different, even though they are both carbon? (I would say they are different)
If so, does this mean a chiral center cannot be double bonded?
Hi again Vladimyr! Yes, 4 different groups need not mean four different atoms. A carbon bonded to methyl group, an ethyl group, a propyl group, and a butyl group would be a chiral center. And a chiral center must be tetrahedral (and therefore sp3 hybridized) so a carbon with a double bond could not be a chiral center. Hope this helps!
Hey Chad!
Could you please tell me what that molecule in 10:55 to the left is called (in IUPAC)?
Hey Youssef! The CH2SH group is a sulfanylmethyl so we have (S)-2-(sulfanylmethyl)butanoic acid
@@ChadsPrep Thanks, I was wondering what that group was called.
@@MrYahya0101 👍 👍 👍
pls don't jump my comment I really need help for my assignment. my question is if we got two chiral and they have the same designation that means both r or s how can we rename it?
2.if we are asked to put the relation after we assign r or s and if we ger 2R,3R and the same for the second one what is the answer us it diastereomers or enatiometric? pls give me answer I am your subscriber and follower
1. Whether both chiral centers have the some configuration or different configurations, you would still list the designation with the carbon number at the beginning of the name [ex. (2R, 3R)- or (2S, 3S)- or (2R, 3S) or (2S, 3R)].
2. Also, if the two structures your are comparing have the same bond connectivity, then they are either identical or some form of stereoisomer.
If their chiral centers are in the same configurations, then they are identical.
If all their chiral centers are in the exact opposite configurations, then they are enantiomers.
If some of their chiral centers are in the same configuration, and some are in the opposite configuration, then they are diastereomers.
I go over this last part in the very next lesson in the playlist 😊
chad, have my babies
if you can somehow get me to understand orgo, i'll let you have my first kid
@@zainaba7247