Synthesis of alcohols using Grignard reagents I | Organic chemistry | Khan Academy
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- čas přidán 10. 07. 2024
- Synthesis of primary, secondary, and tertiary alcohols from aldehydes and ketones using Grignard reagents. Created by Jay.
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Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules!
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You are probably the best tutor ( in organic mechanisms) I have ever come across in You Tube. Please keep up the good work.
This is great. Just a note that H3O+ might be too strong of an acid in these cases, our professor recommends H4NCl.
Pentavalent carbon? That's a sin! I think there are quite a few errors in this mechanism, most evidence points to a grignard reagent being polar covalent rather than ionic, not to mention the carbon with four bonds plus an electron, that ought to be a physical impossibility, carbon being one of the only elements that strictly follows the octet rule.
+Professor Dave Explains beef
few odd mistake fair enough dt we all make some from what ur video havent quite made the cut..appreciate rather than bringing someones effort down
+Steve Harold i'm not trying to bring anyone down, those of us that put out educational videos have a responsibility to make sure they are of the utmost accuracy. if there are errors, they should be pointed out so that misinformation isn't propagated.
+Professor Dave Explains sorry for being defensive
I'm sure that you know a whole lot more about organic chemistry than I do but I'm not really seeing your point. My understanding is that a covalent bond, though I'm a little nervous to present a maxim, is only formed between two nonmetal atoms. So, wouldn't that mean that the carbanion's interaction with the Mg would be ionic? Further more, wouldn't that make sense due to the fact that we are talking about ionic interactions? Again, not saying that you are wrong, but the way that this video explains the interactions between magnesium and carbon seems solid. Also, where are you seeing a pentavalent carbon? The only place that I was able to find one was during, what I assume to be, a concerted mechanism in which the Mg donates a single electron to the carbon and the carbon-halogen bond is removed. I am truly curious so please let me know, thanks.
very very impressive.. Thank u Guys u r making studies so much comfortable
أنت عظيم بجد! 👏💜
Perfect! Thank you!!
This was great, thanks!
You're my hero!!!!!! You explain this a million times better than my professor. Thank you!!!!
You're a Lifesaver!!!!!!!!!! Thank you!
Thanks , very beneficial ...
Thanks! Very useful...
Wow that is just superb !!!
Thank you, that's really helpful, I really appreciate it.
yes right
Awesome explanation! Thanks so much! Had to replay it a few times, spoke a little too fast for me lol
Thx so much !!!!!!!!!!! U r the best!
Very good explanation. I like. Although yes, I feel you do speak quickly, I followed along!~
Genius!!!!
this was a quick and dirty explanation of the mechanism. nice.
Thanks 😊
or you can pause the video do the rxn and watch if you did the steps right. :)
On the example with the formaldehyde, you attacked the carbonyl using the ncarba nion but should there be an arrow showing the MgBr leaving?
Nice bro!!!
sir kindly plz clear the 18 rule for organomettlic compounds ...
The type of connection between CM and the type of connection between Mg-X ??
Hey what about chirality for the aldehyde to secondary alcohol example? I am struggling with chirality and would appreciate some guidance. Does anyone know of a good video explaining chirality in grignard reations?
Is the Grignard reaction a nucleophilic substitution or addition?
❤❤❤❤❤
Thank you SO much! I have the worst professor ever ):
Why is it for the second example that the methyl group went away?
I just paused the video and am thinking the same thing...because once the methyl group is added it will no longer be a secondary, but a tertiary alcohol...
The methyl group was still there and it is a secondary alcohol since the alcohol group was attached to a carbon which is bonded to two other C atom.
same question in my mind right now
quick question, what are the differences between the half-headed curly arrows and the normal curly arrows?
The half-headed arrow illustrates one electron being moved and the full headed arrow shows two electrons being moved
SubliminalSixtyFive Thank you
wait why does only one electron from the Mg attack the methyl halide? why not the pair of electrons
Could any one tell whats is " E+20 " above the arrow...??
+Kazi Salman It's Et(2)O, which is diethyl ether
Annie Higgins Thanxz A Lot..