@@gustavofinkler1229 E ai, de buenas? Kkkkk fora esse vírus que não vai embora, tudo certo. Esse canal me ajudou bastante na época de orgânica II, mas depois acabei não vendo mais nada dele, acabei indo por outros caminhos.. Mas estamos por aí!
@@matheusgodoy8288 Bah cara sabe que eu tô terminando orgânica 1 agora, e em julho eu vou ter que fazer orgânica 2 num mês só (matéria de férias). Vai ser sofrido, já to tentando adiantar alguma coisa mas não tá sendo um caminho muito traquilo. Abraços, se cuide!
First of all I really like your videos I was wondering why the "leaving group" leaves, I understand that it takes an electron and is "happy" on its own but why exactly can/does it take an electron? Is it because it gets energy from something like temperature? So it wouldn't happen in a real cold surrounding? Btw I will spread the word of your amazing teaching videos Greetings from Germany
well it doesn't take an electron, it just spontaneously leaves, with both the electrons in the bond to the rest of the substrate, often due to interactions with solvent molecules.
Do you have any videos explaining the stereoselectivity and stereoselectivity of elimination reactions (Newman projections and E2, anti-periplanar, that stuff?)
Where'd the Br- go? (in the 1st part) where did the single H+ come from? aren't there suppose to be 2 more on that carbon? and how can the water (neutral) act negatively and remove the H+?
+Aaron Michau bromide just went into solution, consider it to be floating around. yes there are two more hydrogens on that carbon, but i only drew the one that i was using in the mechanism. the other two remain implied. water is amphoteric, it can either gain or lose a proton depending on the conditions.
@@ibrhmmcht3907 yes, cause Dave said Br got into solution so there is Br+ and H-. I hope that's what you mean by HBr anyways. (It's not completely the same) so there is HBr but it is in solution.
Professer Dave how do you know which hydrogen will be eliminated to form the carbocation. Thank you for all your videos they are so helpful and greatly appreciated!
What I don`t understand is: How does bromine just leave? In every E1 illustration I miss how kicking out that halogen atom even works, when there is no electrophile present "accepting" it or any other force to break that C-X bond.
does the proton that's being attacked belong to the beta-carbon or the alfa-carbon? I'm guessing beta but you didn't mention it so I'm jusy asking to be sure, great video!
Appreciating the quick responses, but why does E1 not require antiperiplanarity like E2? Also why in E2 does a beta carbon with 2 hydrogens produce cis/trans stereoisomers when it's the only beta carbon with hydrogens (assuming all the other beta positions have other substituents that aren't hydrogen)
because E1 isn't concerted, it has a carbocation intermediate, the p orbital is ready to go. for different protons leading to different E2 products you can see what's going on if you put the molecule in the right conformation for E2 to occur
At the end of a carbon chain, if there are no other specific substituents specified, we know that CH3 is at the terminal position. The hydrogen is coming off from the C at the end of the chain.
well in this example there is only one possible product, but typically yes be aware of multiple possible products! check out my tutorial on zaitsev/hoffman elimination products for more information on predicting the dominant product.
I'm wondering how is it a two step reaction(in the intermediate phase)? cause when I'm comparing this to the SN1 reaction it looks like that the deprotonation of the H is an additional step
+Robert Bhatia it certainly can, and that would be an SN1 reaction, which might compete with E1. however, E1 might be favored if the reaction mixture is heated, or if the base is bulkier than water. just another thing that molecules can do.
Professor Dave Explains It' not that, you jut fail to explain HY thing are happening, for those who actually care to learn why things are happening, rather than just route memorizing.
+Professor Dave Explains There is a "why" to this mechanism. For example, you could have explained why using a beta hydrogen from any of the beta carbons would have been sufficient for this reaction, and not just pick one and go with it. I am only doing this to help you improve, but you're not very open to it, clearly.
all the beta hydrogens are identical, as it's a symmetrical molecule, rather deliberately. just trying to keep it to the basics of the mechanism to maximize comprehension. anything else?
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
Want more OChem help? Find me on Chemmunity: chemmunity.info/dave
I'm glad professor Dave knows "a lot about the science stuff."
and that he's able to explain it.
Hi Professor Dave, I'm Brazilian and wanna thank you to do this amazing work. I'm in the college now, and you're helping me a lot.
+Matheus Eduardo Domingues de Godoy happy to be of service! please spread the word!
Hi Matheus. Brazilian too, doing Chemical Engineering and have just found about this channel. 5 years later, how is it going?
@@gustavofinkler1229 E ai, de buenas? Kkkkk fora esse vírus que não vai embora, tudo certo. Esse canal me ajudou bastante na época de orgânica II, mas depois acabei não vendo mais nada dele, acabei indo por outros caminhos.. Mas estamos por aí!
@@matheusgodoy8288 Bah cara sabe que eu tô terminando orgânica 1 agora, e em julho eu vou ter que fazer orgânica 2 num mês só (matéria de férias). Vai ser sofrido, já to tentando adiantar alguma coisa mas não tá sendo um caminho muito traquilo. Abraços, se cuide!
o que você estuda? saudações de mim, susu el muzza da síria.
Wow Organic Chemistry is so easy! I love this series
So simple, so easy when Professor Dave explains…
First of all I really like your videos
I was wondering why the "leaving group" leaves, I understand that it takes an electron and is "happy" on its own but why exactly can/does it take an electron? Is it because it gets energy from something like temperature? So it wouldn't happen in a real cold surrounding?
Btw I will spread the word of your amazing teaching videos
Greetings from Germany
well it doesn't take an electron, it just spontaneously leaves, with both the electrons in the bond to the rest of the substrate, often due to interactions with solvent molecules.
+Professor Dave Explains thanks for the fast reply, really like that about you
I am always impressed by the way you teach and I really wish to get teachers like you in my country😊
Love from Pakistan❤
شرح مبسط و رائع
شكراً لك أستاذ ديڤ
انا من سورية
أنا في الكلية و اتابع شرحك بمختلف المواد ❤
How is the condition there sister
He teach so good
Do you have any videos explaining the stereoselectivity and stereoselectivity of elimination reactions (Newman projections and E2, anti-periplanar, that stuff?)
Yep there’s one for E2 on cyclic systems, check the organic chemistry playlist!
after watching videos i just subscribed ur channel
Where'd the Br- go? (in the 1st part)
where did the single H+ come from? aren't there suppose to be 2 more on that carbon?
and how can the water (neutral) act negatively and remove the H+?
+Aaron Michau bromide just went into solution, consider it to be floating around. yes there are two more hydrogens on that carbon, but i only drew the one that i was using in the mechanism. the other two remain implied. water is amphoteric, it can either gain or lose a proton depending on the conditions.
@@ProfessorDaveExplains Are there any HBr?
İbrahim Mücahit HBr is a strong acid
@@ibrhmmcht3907 yes, cause Dave said Br got into solution so there is Br+ and H-. I hope that's what you mean by HBr anyways. (It's not completely the same) so there is HBr but it is in solution.
Professer Dave how do you know which hydrogen will be eliminated to form the carbocation. Thank you for all your videos they are so helpful and greatly appreciated!
Just to be clear, what differentiates E1 and E2 reactions from SN1 and SN2 reactions? Thanks!
they are eliminations and not nucleophilic substitutions
Good
What I don`t understand is: How does bromine just leave? In every E1 illustration I miss how kicking out that halogen atom even works, when there is no electrophile present "accepting" it or any other force to break that C-X bond.
The Bromine is a halogen and is happy to be on its own with eight electrons and a negative charge
what are the other transition states of this reaction? Is there only one transition state?
two steps, so two transition states. every step of a mechanism has a transition state.
does the proton that's being attacked belong to the beta-carbon or the alfa-carbon? I'm guessing beta but you didn't mention it so I'm jusy asking to be sure, great video!
just*
yep, beta! always for any elimination.
+Professor Dave Explains alright, Thanks! Having my exam in two days, it's gonna be epic
So what is the difference between SN1 and E1?
one is substitution the other is elimination, very different!
i thought this was a e1 3x3 reaction
Sick tattoo, dude (at 1:36)!
why does he say a weak nucleophile i thought e1 and e2 were only bases and sn1 and sn2 are the ones that have the nucleophiles
Appreciating the quick responses, but why does E1 not require antiperiplanarity like E2? Also why in E2 does a beta carbon with 2 hydrogens produce cis/trans stereoisomers when it's the only beta carbon with hydrogens (assuming all the other beta positions have other substituents that aren't hydrogen)
because E1 isn't concerted, it has a carbocation intermediate, the p orbital is ready to go. for different protons leading to different E2 products you can see what's going on if you put the molecule in the right conformation for E2 to occur
Is the H atom there because of environment with H?
I find myself signing the intro song before the video begins
why does water grab that proton specifically?
Great explanation. You saved my bacon.
Thank you sir
First of all, why does leaving group even leaves... I want to know what makes it leave ?
it has somewhere better to be that is more stable than its previous configuration.
where did the H come from that the Oxygen attached to? also is that beta carbon?
yep it's just a beta proton
I wondered this too now time to google beta proton.
Kindly upload maths lectures also.It will really help in new SAT.
just finished writing a bunch of math tutorials, will shoot next month and upload through the summer!
That's great!!!.............. Thank You.
at 1:31 where did that proton come from is it an invisible hydrogen?
At the end of a carbon chain, if there are no other specific substituents specified, we know that CH3 is at the terminal position. The hydrogen is coming off from the C at the end of the chain.
@@elsabalfe4966 thanks why didn’t he include that?
Thank you
hello, in this elimination does it form any major or minor product or only one product?
well in this example there is only one possible product, but typically yes be aware of multiple possible products! check out my tutorial on zaitsev/hoffman elimination products for more information on predicting the dominant product.
Professor Dave Explains new subscriber y
Pass ho gye sir
oh man i got scared by that sound effect at the end of the video , i thought there was someone in my room :D
could the water have attacked the h's on the other carbons??
+Cindy Martinez yep, though eliminating any proton would lead to the same product, due to the symmetry of the molecule.
I'm wondering how is it a two step reaction(in the intermediate phase)? cause when I'm comparing this to the SN1 reaction it looks like that the deprotonation of the H is an additional step
cheers for that
Why doesnt the water (O-) attack the Carbocation instead of the proton?
+Robert Bhatia it certainly can, and that would be an SN1 reaction, which might compete with E1. however, E1 might be favored if the reaction mixture is heated, or if the base is bulkier than water. just another thing that molecules can do.
thank u very much!!!
Could the water have attacked the carbocation instead of the hydrogen? If so, why didn't it?
yep! lots of factors, temperature, sterics on the substrate, check out my tutorial on choosing the mechanism for more info!
why does the (Br) just leave?
interactions with solvent molecules, it is an endothermic process so it takes a while but happens sometimes.
Professor Dave Explains ohhhh ok thank you!
Ily sm
NiCE very happy
Thank you chemistry Jesus
E1 short form of what ?!
Elimination rxn 1
Hi professor, could you please do a video about GMO's? thanks
رائع
bohr reborn
You're going too far (for only now though)
88888 views, hmm....
You are my God 🙏🙏🙏🙏🙏🙏🙏🙏
Poor explanation.
+Rah L. think you can do better, chief?
Professor Dave Explains It' not that, you jut fail to explain HY thing are happening, for those who actually care to learn why things are happening, rather than just route memorizing.
there is no "why". molecules simply collide and react.
+Professor Dave Explains There is a "why" to this mechanism. For example, you could have explained why using a beta hydrogen from any of the beta carbons would have been sufficient for this reaction, and not just pick one and go with it.
I am only doing this to help you improve, but you're not very open to it, clearly.
all the beta hydrogens are identical, as it's a symmetrical molecule, rather deliberately. just trying to keep it to the basics of the mechanism to maximize comprehension. anything else?