Kinetic vs Thermodynamic Product - 1,2 vs 1,4 Addition of HBr to 1,3- Butadiene
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- เผยแพร่เมื่อ 7 ก.ค. 2024
- This organic chemistry video tutorial provides a basic introduction into the 1,2 addition reaction and the 1,4 addition of HBr to 1,3-butadiene. The kinetic product is the major product that forms faster at a low temperature. The thermodynamic product is the most stable alkene that forms as the major product at high temperatures.
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Found this of Great Help
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Very helpful video 👍
Ooooh i was studying that part suddenly you shock me with that video!
am I correct? so at 4:02. so because its low -40c its always going to be 1,2 addition and b/c its high 60c its always going to 1,4 addition? they are not going to change position ?
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I don't undestand in the first part of the video why the kinetic products would be formed in low temperature. In my logic as an increase of temperature is an kinetic factor, the reaction would be faster and the product formed should be the one formed quicker. Right? If anyon ecould help I would appreciate it very much
never mind, I just got it. For anyone wondering: the increase of temperature often leads to an increase of the reaction rate constant which enables the thermodynamic equilibrum to be reached faster. which means that the longer one waits, the more we form the thermodynamic product. At the end this product will be in majority.
how do we know whre to put the alkene
When you have a diene that isn't symmetrical how do you know which double bond is going to undergo the reaction?
One which is more substituted would react
Think this problem like this: which is more stable for example a tertiary or a secondary carbonation
@@nikhilpundir1433 wouldn’t the less substituted double bond react because less substituted double bonds are less stable?
@@hazeld8016 less stable doesn't mean that they would be more reactive. Go through the reaction mechanism and you would see that in the first step alkene will give it's electron to Hydrogen of hbr to form a carbocation and the most stable carbocation would be formed from more substituted alkene isn't it
@@nikhilpundir1433 pleaseeee help im so confused about which resonance structure to use. the positive charge and double bond can just be chasing each other around the structure. im currently working with cyclic compounds and i really don’t understand how my teacher is picking which structure to use, im probably just dumb and missing something but i can’t find any good answers online
What about isolated diene reaction ??
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I dont understand how the kinetic product is mono substituted versus the thermodynamic product being disubstituted. I can't visual the two versus one R groups
Smart human
Why is the primary halogenalkane the more stable product thermodinamically?
More no. of alpha hydrogens that causes it to form more hyperconj structures
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is it normal to study this in high school? here in india we do study it :/
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This makes me so happy I’m not in chemistry anymore.
This shit is cool tho, not like maths🤢
@@cowgang7395 I was super bad at chemistry 😭
How do you feel about him not uploading full tutorial vids now, these are all only half videos. I dont see many mentioning this
@@eobardrush2112 I was wondering why many of his videos (I made a playlist last semester for ochem 1) appeared as non existent. I thought I was imagining it.
But why is the second product the thermodynamic stable product?? The video did just end very abrupt
I may be wrong, but because the thermodynamic reaction is the slower product formation, it has time to select for the more stable product (the di-substituted alkene). In the kinetic reaction, it happens so quickly that the Br- reacts with whatever reactant is closest and more immediately stable.
Because it is a more substituted alkene. Hence it is more stable
this video doesnt make sense at the end, primary cation simply do not exist and cannot be synthesised so the mechanism has to be different
I'm still diene
SAME
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First comment
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It’s product, not produck
Do you know a term called "accent"?
@@ananyapal14_11 yes, and completely omitting a letter is not the same thing as an accent
@@ananyapal14_11 not an accent I think he’s got a speech impediment
Thanks that shit was pissing me off
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Just like " A bou o wa " ?