"I'm not going to write the whole thing" (Dead silence. No one arguing with you) "I'll just write the whole thing" hahaha Anyways this video/playlist is super helpful. Thanks.
wow, I really can't thank you enough sooooo helpful! Thanks for taking time out of your day to make these videos, you help tons of students everywhere!
I was really worried: I've heard EVERYONE say how difficult oChem is. So when I heard of chirality, I was scared, but this concept comes extremely easy to me.
Sal I hope you know that you are an inspiration to millions of students around the world watching your videos everyday. I really wish you the best and may you succeed in everything you wish to accomplish
Makes me think of a short story by Arthur C Clarke about a man who accidentally fell into a 4th dimension of space, resulting in all his molecules changing chirality. The result was that he could not attain nourishment from anything he ate and so started starving.
When I give a speech on my med graduation day, I will say 'I would like to thanks those who has always been there for me, and those are, Mr Google, KhanAcademy and Mr RUclips'.
I sit in class for 1 hour and 20 minutes hearing the droning of a refrigerator and learn nothing. I sit here for 6 minutes and it starts to make sense.
Just one question, the hydrogen in the example( in between the other two groups) is in the centre it will still be in the centre which ever way it is rotated ???
@DaKingCobra11 The hand example is a 2 dimensional figure so I can rotate it to be superimposable.. But if it was SP3 molecule you couldn't superimpose them.... am I seeing this right?
Chiral centres are applicable in amino acids, though some are likely to be Oggston's 3-point attachment theorem. Hence, they are essential in enzymes (in nature L-form). So, primary, secondary, tertiary structures of enzymes would be altered by D-form, I believe.
4:40 i think sal messed up the mirror image drawing of the molecule. the methyl group should have a dashed line and the hydrogen should have a wedged line
I'm a little confused, at 4:02 you mentioned carbon is bonded with CH 3 a methyl group ? isn't it an ethyl since it's two carbon and not one ? eth= 2 carbon, and meth=1 carbon ? or do i got it wrong ?
It's methyl. When considering identifying a group you just identify what protrudes from the central Carbon...since only CH3 protrudes from the central Carbon than it is only a Methyl. If you were to name the molecule though it would be Ethyl: 1-Bromo-1-Fluroehtyl (the rules for naming molecules IUPAC and naming groups can be a bit tricky and requires work to learn)
L-form and D-form, are how the molecule "bends light". R- and S- designation, are shorthand to distinguish between the two enantiomers, left or right handedness of molecule. Eg, when the smallest side group attached to a chiral carbon, is placed at rear of molecule, then the three other groups may rotate clockwise (R-), or anticlockwise (S-), going from heaviest side group, to second heaviest, then third. Oggston discovered that nature can tell the difference between 2 different, and two similar side groups, by the nature of attachment. The example Biochemists quote is cis-aconitate in TCA cycle. Might well apply to Glutamic acid, eg MSG. Hope it wasn't synthetically sourced, Chemists just don't get 100% Yields in such reactions (Racemisation)!!!
No but that's an easy mistake to make. Look closely at the planes in which each of the three groups below the carbon are in. If you looked at it from above (looking downward through the fluorine and carbon) you would see the molecules arranged methane, bromine, hydrogen (counterclockwise) on the left compound. If you looked down on the other it would be methane, hydrogen, bromine. If you rotated the left compound one "tick" counterclockwise, you would have the bromine in back and the hydrogen on the left.
@@jayasmrmore3687 yeah that’s true for the author of this clip maybe? Drawing 3D is more difficult than 2D. But not that difficult it is? Back then I was just making sure that I understood it correctly and that the examples used are in fact non super imposable. I was, years ago, trying to correctly understand chirality. However, now 4 years later I am quite sure the visual examples given do not perfectly support the explanation for chirality :) I’ve seen 3D drawings of molecules and then you see why the mirror image of chiral molecules cannot be superimposed on eachother.
tnx again for this another helpful video...I jst have this one doubt regarding chiral carbon...so..if there is one ethyl group and one butyl group at two sides of one carbon nd two different groups on other two sides..will it be chiral carbon..or not??I mean.. are ethyl and butyl are two different groups here??advanced tnx..
"I'm not going to write the whole thing"
(Dead silence. No one arguing with you)
"I'll just write the whole thing" hahaha
Anyways this video/playlist is super helpful. Thanks.
"won't write whole thing"
(Thinks for a while)
"Naah, they are dumb, they won't understand")
lol
@@laughingkoffin lol hahaha
i am a south african student...just letting you know u helping even us who are so far away..thank you.
fulufhelo nemutandani physics and agriculture are not the same thing
+shao khan shut up
DOGE™
make me
***** m9 ill rek u i swear on me mum!!!!
***** don't let your dreams be dreams!!!!!!!!
wow, I really can't thank you enough sooooo helpful! Thanks for taking time out of your day to make these videos, you help tons of students everywhere!
Thank you sir for helping to simplify the only chemistry I've taken where I can feel the air stir above me as the entire lesson flew over my head.
9 years ago u made a comment and no likes I fell bad to pass u by. Here's mine👍.go on
That is very caring of u. I'm liking ur comment two years after and his 11 years after wow
@@mohamedfazil6345
after blackboard is full it looks so pretty with all those colors
You are litterally saving me with these videos. I don't get anything in Chemistry but this is wow. So thank you!!
sal, you have saved my life, with your organic chemistry videos..!!!
awesomeeeeee
I was really worried: I've heard EVERYONE say how difficult oChem is. So when I heard of chirality, I was scared, but this concept comes extremely easy to me.
Thank you for saving me right now, I am actually having trouble understanding it so I searched on youtube. Thank you!
This concept was not making any sense to me, but now it does! Thank you.
i cannot express my love for this Organic chemistry videos. saving me in college :D
This is so cool. I've never learned this before I saw this video. Love your videos.
I prefer to think of it as the study of change
think of what? organic chem?
Sal I hope you know that you are an inspiration to millions of students around the world watching your videos everyday. I really wish you the best and may you succeed in everything you wish to accomplish
Thank you Khan Acad!
Finally makes sense.
Thank you sir ❤ you really helped me to ace my topics.
From India
I always look up your vid so I can understand organic chemistry. Thank you so much!
now i feel like I can teach others organic chemistry! A nice refresher course, wish I continued with organic chemistry in my degree...
So are you teaching now?
@Casowsky i didn't catch that but that's why I love him. So patient lol.
You are soooo Briliant....this made things super Clear, Big Thank You
Your Orgo teaching skills are phenomenal Mr. Khan!
Makes me think of a short story by Arthur C Clarke about a man who accidentally fell into a 4th dimension of space, resulting in all his molecules changing chirality. The result was that he could not attain nourishment from anything he ate and so started starving.
You deserve lot of respect .
i used to watch random useless failblog videos when i was procrastinating. but now i watch Sal's videos when im bored and dont feel like studying!!
When I give a speech on my med graduation day, I will say 'I would like to thanks those who has always been there for me, and those are, Mr Google, KhanAcademy and Mr RUclips'.
ms*
Huh?@@rurueuedits
i love you khan academy :') you make my life simpler. i like your handwriting
"I am not gonna write the whole thing"
"I m gonnna write the whole thing" 😂😂
SAL is the best💜💜
HEISENBERGGGG
SOOO HELPFUL. Thank you so much for taking the time to make all these videos!
Brilliant video! It's amazing how simple things are when they're explained well.
Love it from Ethiopia 💯👍
I'm here to understand Death Stranding better lmao
IronVigilance Gaming 🙌
Same!
System Failed Successfully
thank Mr khan!!!! your a star!
You are a life saver...! THANKS!
I don't even need to know this, but his voice makes me feel clever and I'm in exam week so... yeh xd
Always good to have more knowledge
You guys are doing a great job!!
Great help for me you have done
Thank You Sir 😊
Thank you so much, this helped me out heaps!!!
Thank you so much....its so helpful
Thank evolution for inventing hands. Now I can take my hands to the exam and no one will punish me!
your explanation is fantastic
thank you alot!
you are just soooo smart!!!!!!!!!
Best 👏Thank you so much
A HIDEO KOJIMA GAME
Thank you for this! definitely saved me from flunking the exam
I sit in class for 1 hour and 20 minutes hearing the droning of a refrigerator and learn nothing. I sit here for 6 minutes and it starts to make sense.
"I'm not gonna write the whole thing...." "Let me just write the whole thing."
Just one question, the hydrogen in the example( in between the other two groups) is in the centre it will still be in the centre which ever way it is rotated ???
It is not in centre, it is in 3d.
So in reality you won't be able to tell which one is middle or which one is at the edge
Sal, the mirror image to be produced is from the right hand( palm side) and not the left.
OMB thaxx a looooot!! You don´t how much u´ve helped me ;)
these 10year old videos are gold
Thank you very much. Great
thank you sir
great illustration
I LOVE YOU this makes sense
Depends on what symmetry they have. Even chiral molecules can have symmetry of some sorts.
Superimposable***
He wrote Superimpossible🤣🤣
Here after 10 years,,,🔥....
If I raise my left hand and touch the mirror the hand in the mirror directly superimposes onto the hand touching the mirror so I don’t understand.
thank you soooo much
thank you!!!!
You r awesome!
Great video
"I'm not gonna write the entire thing."
"I'll just write the entire thing."
Man was defeated.
BASED KHAN
@DaKingCobra11 The hand example is a 2 dimensional figure so I can rotate it to be superimposable.. But if it was SP3 molecule you couldn't superimpose them.... am I seeing this right?
Sal's everyone's favourite uncle :)
Awesomeeee !!! =D
FinaLy i get itt .. thx
the dislikes are from bitter teachers.....lol
u rock and make chemistry a cakewalk for me...thanks...
What dislikes?
Some hands on learning, going on here.
Chiral centres are applicable in amino acids, though some are likely to be Oggston's 3-point attachment theorem. Hence, they are essential in enzymes (in nature L-form). So, primary, secondary, tertiary structures of enzymes would be altered by D-form, I believe.
Imagine an enzyme as, a left hand glove on a right hand? Maybe, driving gloves?????
"I'm not gonna write the whole thing, you know, not, superimposable... I'll just write the whole thing..." lmao
Thanks....
4:40 i think sal messed up the mirror image drawing of the molecule. the methyl group should have a dashed line and the hydrogen should have a wedged line
TeaNcrumpets RS That would be the same molecule. Sal drew the mirror image.
I have an orgo exam in 2 days; I was super pissed until I saw your videos.
I'm a little confused, at 4:02 you mentioned carbon is bonded with CH 3 a methyl group ? isn't it an ethyl since it's two carbon and not one ? eth= 2 carbon, and meth=1 carbon ? or do i got it wrong ?
It's methyl. When considering identifying a group you just identify what protrudes from the central Carbon...since only CH3 protrudes from the central Carbon than it is only a Methyl. If you were to name the molecule though it would be Ethyl: 1-Bromo-1-Fluroehtyl (the rules for naming molecules IUPAC and naming groups can be a bit tricky and requires work to learn)
When is chemistry for 12th India coming in app?
So the two carbons in the top right are chiral? But they are bonded to the same four groups, just in a different 3D shape...
L-form and D-form, are how the molecule "bends light". R- and S- designation, are shorthand to distinguish between the two enantiomers, left or right handedness of molecule. Eg, when the smallest side group attached to a chiral carbon, is placed at rear of molecule, then the three other groups may rotate clockwise (R-), or anticlockwise (S-), going from heaviest side group, to second heaviest, then third.
Oggston discovered that nature can tell the difference between 2 different, and two similar side groups, by the nature of attachment. The example Biochemists quote is cis-aconitate in TCA cycle. Might well apply to Glutamic acid, eg MSG. Hope it wasn't synthetically sourced, Chemists just don't get 100% Yields in such reactions (Racemisation)!!!
if you take the mirror image of the chiral carbon, wouldn't the methyl group go toward the back and the hydrogen go toward us (the front)?
No but that's an easy mistake to make. Look closely at the planes in which each of the three groups below the carbon are in. If you looked at it from above (looking downward through the fluorine and carbon) you would see the molecules arranged methane, bromine, hydrogen (counterclockwise) on the left compound. If you looked down on the other it would be methane, hydrogen, bromine. If you rotated the left compound one "tick" counterclockwise, you would have the bromine in back and the hydrogen on the left.
+andrew maldonado I was confused too but thanks, your explanation helped
Am I the only one who finds that all examples given are super imposable if you rotate them 180 degrees?
Hands are not. If you rotate your hand 180 degrees then the palm is facing upward.
Yeah in real life I know. But the 2D examples are in my opinion super imposable mirror images. I think he should have used 3D images :)
@@sanderossi8013 maybe it’s hard to do 3D on screen
@@jayasmrmore3687 yeah that’s true for the author of this clip maybe? Drawing 3D is more difficult than 2D. But not that difficult it is? Back then I was just making sure that I understood it correctly and that the examples used are in fact non super imposable. I was, years ago, trying to correctly understand chirality.
However, now 4 years later I am quite sure the visual examples given do not perfectly support the explanation for chirality :)
I’ve seen 3D drawings of molecules and then you see why the mirror image of chiral molecules cannot be superimposed on eachother.
There's a spelling mistake in this video Sal!!! It's spelled superimposable not superimposible
How would you find R or S if there is no chiral center on your line drawing?
Gracias.
tnx again for this another helpful video...I jst have this one doubt regarding chiral carbon...so..if there is one ethyl group and one butyl group at two sides of one carbon nd two different groups on other two sides..will it be chiral carbon..or not??I mean.. are ethyl and butyl are two different groups here??advanced tnx..
The Wikipedia article on chirality is good.
Meso tartaric acid has a non superimposible mirror image (R,S) and (S,R)... so is it chiral?
you rock...
I definitely see a yellow hand not a green one lol
Wait so are only asymmetrical molecules chiral, or can symmetrical molecules be chiral?
I don't understand , How turning 180 degree of hand won't make it superimposeable
because your palm is facing the opposite direction.
the 1st person to view this! yay!
@amory88 R and S only work for chiral centers..
I always watch these videos at ×1.25 speed.
cutest friggen hand drawing evah
What's the difference between chiral and asymmetrical?
I'm pretty sure it's the same.
Chiral Network
Is anyone else here from Breaking Bad?
Help me out here, professor!
Ok it veary good,thak