7 E1 vs E2
ฝัง
- เผยแพร่เมื่อ 20 ก.ค. 2024
- E1 vs E2 Reactions: Chad breaks down everything the undergraduate organic chemistry student needs to know regarding E1 and E2 reactions including substrate effects, base effects, solvent effects, and what makes a good leaving group. The mechanisms are covered including the antiperiplanar requirement and concerted mechanism of E2 reactions and the multi-step mechanism centering on carbocation formation of E1 reactions.
You'll also learn Zaitsev's Rule (Saytzeff's Rule), how to predict the Zaitsev product, and the exceptions to Zaitsev's Rule when the Hofmann product (anti-Zaitsev product) is the major product under certain conditions for E2 reactions. Finally, Chad concludes the lesson working a few examples so that you clearly understand how to distinguish between E1 and E2 reactions.
Happy Studying!
00:00 - Stability of Alkenes
03:21 - Zaitsev's Rule in Elimination Reactions
07:02 - E2 Reactions
09:50 - Antiperiplanar Stereoselectivity of E2 Reactions
25:20 - Hofmann Elimination Using Bulky Bases in E2 Reactions
28:54 - Hofmann Elimination with Poor Leaving Groups in E2 Reactions
31:53 - E1 Reactions
37:12 - Distinguishing Between E1 and E2
www.chadsprep.com/
As someone who enjoys learning chemistry on my own these videos really are a blessing. I'm looking forward to the rest of your content :)
Glad you are enjoying it - Happy Studying!
Chad, Thank you so much!
You really help so many students do well on these difficult courses.
You'r a LEGEND!!!! THANK YOU!!
You're very welcome! Glad you found this lesson useful! I'll actually be re-filming the entire organic playlist using a whiteboard and releasing them throughout the school year. Happy Studying!
Great presentation my man. I really appreciate the lecture.
Glad you liked it Peter!
Chad,
Thank you, so much for your awesome videos! They have helped me so much.
You're welcome, Rose - glad to hear it!
love your video, respect from China! You make organic fun and easy to understand.
Glad you like them, Anna!
Your be still shirt is the best! Thank you for the knowledge!
You're welcome, and thank you!
You’re a blessing!!! Thank you
Hi at 23:00 why is it hofmann instead of zaistev. In cases of Antiperiplanar would we use Hofmann?
Chad, you're such a blessing! I find it hard to sit in the classroom and focus all throughout the 3 hr lecture so looking back at your videos really help🤧🤧 if I get an A in Ochem, its all you
Thanks for saying so, Rania - hope you do well in Ochem.
@ 20:08 you redrew the z isomer without a wedge on the benzene ring as the final product why is that? i thought when we rotate we keep the wedge?
YOU ARE AMAZING! Thanks for saving my O-Chem grade!
Glad the channel is helping you!
I really appreciate your work.
Excellent!
Big thanks from Belgium!
A big you're welcome from the U.S., Maxime - Happy Studying!
Ive just found this channel 🥴 it was 1hour before the test and I really think ive leant a a lot and I will come back again to this video and same comment when ive finished writing ......
Glad you found us - hope you did well on the test.
@@ChadsPrep thank you very much for the 1st time in 3 consecutive tests that I've written I finally managed to get 70 % can't thank you enough but thank you😘
@@ATM_GAMINGTOUR Glad to hear it!
love ur vid. helps me a lot
Glad to hear it, Irfan - Happy Studying!
At 34:00, what is stopping the water molecule from attacking the carbocation directly instead of grabbing some random protons? Isn't the positive charge on the carbocation more attractive than some neutral hydrogens? I find it a bit suspicious, because when water grabs that proton, it becomes positively charged itself, as a hydronium ion, so we're producing quite a strong acid (positively -charged) in a reaction involving a base (sure, a weak base, but still a base). Moreover, we have an even stronger base floating around - the bromide ions, which are still negatively-charged after they left the molecule. Wouldn't a bromide ion be a better candidate to take off that proton? :q
HBr is a strong acid. Therefore Br(-) is a weak base.
You're really good at this
Thanks for saying so, Jason!
I love your videos!
Glad you do, Kubensis -thanks for commenting!
you are the BEST! Thank you
Thank you so much, negar - You're welcome!
Thank you sooooo much 😊
Yoooou're Welcome!
Thank u so much sir.
You are welcome, Alma - thanks for your comment.
Thank you chad for this video.
Very welcome
@@ChadsPrep About to go to class and learn about E1 and E2 you are the goat hopefully i'll be solving these problems before my prof does :)
@@user-hc5qb5tc5c Hope it goes well!
What was the bad leaving group that Hofmann worked with ?
Amine leaving group (and amines are moderate bases and so poor leaving groups). I have a video regarding the Hofmann Elimination, the reaction that bears his name, here: www.chadsprep.com/chads-organic-chemistry-videos/hofmann-elimination-cope-elimination/ 😊
ur a hero
Thanks!
Chad I will be offended if I dont subscribe to you. Thank u for these
You're welcome, Daniel - thanks for subscribing!
can you come and teach at CSUN, our chem department sucks.... "read the book" they say!
Sorry to hear of your challenges, Insha Neupane - glad the videos are helping.
Just know, i just subscribed.
Thank you!
Maybe I'm just dumb , what the hell !!??
I find it incredibly triggering that E Z and not switched... I mean the letters could easily represent what the are with E and Z. the letter Z is clearly trans and E is clearly cis.This is why life is hard right here. Because people do stupid stuff like this... thankfully I'm ALWAYS going to remember it now lol
Glad to hear the channel is helping you - Happy Studying!
Watching this on 1.5x
That's a great option - whatever helps you to learn, right? Happy Studying!
Can u explain this in hindi 🤣🤣🤣🤣🤣
😝 😝 😝 😝 😝 Not a chance!