Alkyne Reactions & Tautomerization: Crash Course Organic Chemistry #18
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Date: 2022-04-04
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Comments and reviews: 10
Giorgio
As an organic chemist, I decided to watch this for fun while having breakfast. I quickly found myself glued to the screen! The explanation is so clear and elegant, yet thorough enough to help you pass an organic chemistry 101 exam; the illustrations are really high quality and the animation really helps with understanding electron pushing.
I feel like some university level organic chemistry lectures would greatly be improved if the teacher just played this video at half-speed.
I'll definitely be watching more of these. Huge thanks to the whole Crash Course team!
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As an organic chemist, I decided to watch this for fun while having breakfast. I quickly found myself glued to the screen! The explanation is so clear and elegant, yet thorough enough to help you pass an organic chemistry 101 exam; the illustrations are really high quality and the animation really helps with understanding electron pushing.
I feel like some university level organic chemistry lectures would greatly be improved if the teacher just played this video at half-speed.
I'll definitely be watching more of these. Huge thanks to the whole Crash Course team!
reply
Joshua
A quick note on hydroboration-oxidation: typically, disiamylborane (a -bulkier- variation of borane) is used to prevent the formation of messy product mixtures. Since alkynes have two pi bonds and can react twice, a reaction with borane causes unwanted, extra additions. However, the steric hindrance from using disiamylborane prevents such extraneous additions from happening. Therefore, disiamylborane is useful in hydroboration-oxidation because the reaction would only yield one major organic product, which is typically desired.
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A quick note on hydroboration-oxidation: typically, disiamylborane (a -bulkier- variation of borane) is used to prevent the formation of messy product mixtures. Since alkynes have two pi bonds and can react twice, a reaction with borane causes unwanted, extra additions. However, the steric hindrance from using disiamylborane prevents such extraneous additions from happening. Therefore, disiamylborane is useful in hydroboration-oxidation because the reaction would only yield one major organic product, which is typically desired.
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Justin
For the base-catalyzed tautomerization reaction, wouldn't it be inaccurate to use BH3? BH3 can perform the addition twice, so in order to prevent this from happening wouldn't you need a larger boron compound with two large substituents? Like disiamylborane? A larger boron molecule would mean more steric hindrance and ensure water doesn't add across the alkyne twice and you get the desired product, unlike with BH3.
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For the base-catalyzed tautomerization reaction, wouldn't it be inaccurate to use BH3? BH3 can perform the addition twice, so in order to prevent this from happening wouldn't you need a larger boron compound with two large substituents? Like disiamylborane? A larger boron molecule would mean more steric hindrance and ensure water doesn't add across the alkyne twice and you get the desired product, unlike with BH3.
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Rachmah
As a student in chemistry, I dedided watch this video not only as a media for my study when facing exams, but I also see it to see how to explain material in a very fun and enjoyable way for my students in the future. Seeing the comments sections makes me even more sure that students are happy with fun learning chemistry on this way like this
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As a student in chemistry, I dedided watch this video not only as a media for my study when facing exams, but I also see it to see how to explain material in a very fun and enjoyable way for my students in the future. Seeing the comments sections makes me even more sure that students are happy with fun learning chemistry on this way like this
reply
Tom
Love Peace - Is there anyone who only watches these videos for fun like me?
Totally! Wish I'd had more organic chemistry in 1970! My tutor vanished for 6 months so I didn't get past the methane / ethane /. isobutane etcetera starter: -(
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Love Peace - Is there anyone who only watches these videos for fun like me?
Totally! Wish I'd had more organic chemistry in 1970! My tutor vanished for 6 months so I didn't get past the methane / ethane /. isobutane etcetera starter: -(
reply
Chasity
LOVE THIS! Can you PLEASE do a video about Palythoa Toxica? My little girls and I almost died from an airborne toxin/ coral polyp in my reef tank, and NO ONE in the hospital knew how to help us.
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LOVE THIS! Can you PLEASE do a video about Palythoa Toxica? My little girls and I almost died from an airborne toxin/ coral polyp in my reef tank, and NO ONE in the hospital knew how to help us.
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Leonel
What-s it like being able to watch this without getting flashbacks to how traumatic organic chemistry was? It-s a fun subject but not when you-re competing with pre-meds for a good grade.
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What-s it like being able to watch this without getting flashbacks to how traumatic organic chemistry was? It-s a fun subject but not when you-re competing with pre-meds for a good grade.
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Jeff
- 3: 42
What's with the playschool microscope? Objective lenses are an inch above the slide. So i guess this purple prop is to connote SCIENCE? Too silly
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- 3: 42
What's with the playschool microscope? Objective lenses are an inch above the slide. So i guess this purple prop is to connote SCIENCE? Too silly
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TheRogueThunder
Constructive feedback: I would have loved for this to be, say 14 minutes and move slightly slower. Watching on. 75 speed with lots of pausing.
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Constructive feedback: I would have loved for this to be, say 14 minutes and move slightly slower. Watching on. 75 speed with lots of pausing.
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Adaginy
These have been too dense for me for about 10 episodes, but I do like watching the first few minutes to learn about real world applications.
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These have been too dense for me for about 10 episodes, but I do like watching the first few minutes to learn about real world applications.
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