Hydride Shift and Methyl Shift - Carbocation Rearrangements | Organic Chemistry
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- เผยแพร่เมื่อ 2 ส.ค. 2024
- If you are wondering when do to use hydride shifts, methyl shifts, alkyl shifts, carbocation rearrangements, don’t worry I will go over some helpful tricks to get the right product.
We’ll go over a hydride shift mechanism and a methyl shift mechanism in hydrohalogenation reactions of alkenes.
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I was confused about when these shifts occurred, even after reading the textbook. Thanks for clearing this up for me! Clear, concise, and great visuals!
Thank! I was lazy in my senior high days and college professors require you to know everything you've learned in high school. These videos are really helpful!
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I was having trouble remembering when to use which rearrangement and this video was super helpful, thank you !
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This is the best video on carbocation rearrangement! Thank you!
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I'm a visual learner so listening to my professor explain this was confusing. Your videos really help. If you can talk about Sn 1 and Sn2 mechanisms as well that would be awesome. Thank you !
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A doubt: what about ring expansion in the cyclopentane molecule? Does a 3° carbocation bring more stability than expanding the ring?
That’s what I thought too.
Yes
But here she taught about hydride shift how it happen ... Nice video
For methyl shifts to happen, do the carbon with the + and the methyl-donating carbon need to be adjacent?
In cyclopentane example why is not ring expansion first and then hydride shift ?
Amazingly helpful video as always. I have another question that's not related to this video, so I apologize for that, but I was wondering if it's true that you can find the valence electron of a transition metal by their electron configuration. We have a test tomorrow in my Chemistry class and we've been learning about ionic and covalent compounds as well as polyatomic ions and my teacher didn't really tell us how to find the valence electrons of a transition metal that much so... I kinda searched it up and I wasn't sure so I wanted to ask you before I even think of applying that to the test. ☺️💕
Hi Selena, yes this is true, you add the electrons that are in the highest energy shells (the highest coefficient). For example for Carbon, it has an electron configuration of 1s2 2s2 2p2, we only add the electrons in the highest energy shells so that would be 2sp2 and 2p2, 2+2 gives us 4 valence electrons which is correct for carbon.
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I have one doubt that if one tertiary carbocation is present next to another tertiary carbon and if shifting would take place the carbocation on next carbon would be more stable (on the basis of hyperconjugation)........ So shifting would take place or not??
In the app the example shown @3:00 , they call the shift an alkyl shift, is this another way of saying methyl shift?
How if the double bond next to only 2 different carbon? Is it alkyl or hydride?
At 1:52 hydride-shift can occur but it makes a minor product. The major one, a six membered ring, is produced by ring expansion in the reaction.
Anyone let me know if I am wrong.
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Won't there be ring expansion?
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Oh I see what you mean. There's a name and email address bar that doesn't show up on my browser, only my phone. Thanks for the help and keep making videos! They're awesome and just between us, you're a much better teacher than most chem professors or TH-camrs, but don't tell them I said that. Cheers and hope you have a lovely Christmas (if you celebrate it, if not have a good next Wednesday).
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