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E/Z Alkenes, Electrophilic Addition, & Carbocations: Crash Course Organic Chemistry #14 

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Alkenes are an important type of molecule in organic chemistry that we’re going to see a lot more of in this series. But before we can really get into the many cool reactions alkenes do, we need to go over some of the basics. In this episode of Crash Course Organic Chemistry, we’ll review and build on our knowledge of alkene nomenclature, revisit our friend the carbocation, and learn Markovnikov’s Rule: an important tool that will help us predict the products of addition reactions involving alkenes.
Series Sources:
Brown, W. H., Iverson, B. L., Ansyln, E. V., Foote, C., Organic Chemistry; 8th ed.; Cengage Learning, Boston, 2018.
Bruice, P. Y., Organic Chemistry, 7th ed.; Pearson Education, Inc., United States, 2014.
Clayden, J., Greeves, N., Warren., S., Organic Chemistry, 2nd ed.; Oxford University Press, New York, 2012.
Jones Jr., M.; Fleming, S. A., Organic Chemistry, 5th ed.; W. W. Norton & Company, New York, 2014.
Klein., D., Organic Chemistry; 1st ed.; John Wiley & Sons, United States, 2012.
Louden M., Organic Chemistry; 5th ed.; Roberts and Company Publishers, Colorado, 2009.
McMurry, J., Organic Chemistry, 9th ed.; Cengage Learning, Boston, 2016.
Smith, J. G., Organic chemistry; 6th ed.; McGraw-Hill Education, New York, 2020.
Wade., L. G., Organic Chemistry; 8th ed.; Pearson Education, Inc., United States, 2013.
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13 окт 2020

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Комментарии : 81   
@lessgogeezers
@lessgogeezers 3 года назад
RU-vid recommended me this 1 day before chemistry exam. Damn, even RU-vid cares more about me than I do.
@zachheilman784
@zachheilman784 3 года назад
I've been following several chemistry channels (NurdRage, NileRed, Explosions&Fire) and this series has really started to connect some of the dots when they talk about the reactions they're doing - thanks so much for these videos!
@dianavanwinkle2299
@dianavanwinkle2299 11 дней назад
Honestly the part when she says, "okay, deep breath" is so real.
@bleuemoone8710
@bleuemoone8710 3 года назад
Could have used this series back when I took ochem but now I'm in biochem so is probably useful still!
@vaughnjohnson8767
@vaughnjohnson8767 3 года назад
“We can use the Ez method.” Me: are you sure about that?
@diegoroman7092
@diegoroman7092 Год назад
This video was pretty good. Understood some bits and pieces of my lecture today, but this video connected all the dots. Thank you!
@anjulovesdoracakes22
@anjulovesdoracakes22 3 года назад
First comment!!! I'm currently studying chemistry and didn't understand organic chemistry so well, but after this series, I understood it nicely!
@Thanos-hp1mw
@Thanos-hp1mw 2 года назад
This is definitely one of my favorites of crash course.
@zayrael
@zayrael 3 года назад
Absolutely amazing video, the animations help SOOO much and the concepts were explained so well! Made for a great review. Thank you CC for once again carrying my OChem grade.
@masterofalltrades999
@masterofalltrades999 3 года назад
Just a day after I took an exam on this...
@jneal1347
@jneal1347 3 года назад
Same XD
@nathatleue
@nathatleue 3 года назад
IB HL Chem here! My exam is in 2 weeks lol
@maglo8
@maglo8 6 месяцев назад
So I’m actually a PhD chemist who mainly does organic chemistry. I watched this in the hope to see if E and Z isomers have different reactivity to HBr. That topic was unfortunately not mentioned…. But when I listen to this, I’m no longer surprised that so many students tell me that organic chemistry is confusing. If this video here is a good representation on how it’s taught then I would probably also get confused. There is no need to introduce a major principle on addition reactions but then spending more time on special cases than on the most common one. And the foundation needs more detail. 1. It’s always like a magnet: negative charge goes towards positive charge to form an intermediate and the reaction takes place if that can easily stabilize into something more favorable. When I start explaining reactions in org chem then I first talk about electronegativity. 2. You need to first explain at length why certain carbocations are more stable than others, practice that a little bit and then apply this to addition reactions. Markovnikov derives from there automatically. Proton shifts can happen occasionally, while methyl shifts are much more rare. If you talk about that then you also need to explain why a methyl group can actually move while most other groups don’t. Better would be not to teach that at all though.
@ShirinRose
@ShirinRose 3 года назад
I'm from the Blue Mountains in Australia! So cool to see them featured here 😃
@shelbieht5360
@shelbieht5360 3 года назад
Don't even study chemistry I just want to be more aware and knowledgeable
@dredgen__ren6889
@dredgen__ren6889 3 года назад
Same here :)
@shelbieht5360
@shelbieht5360 3 года назад
@@dredgen__ren6889 amazing 👌
@alexbourke7209
@alexbourke7209 3 года назад
Good will hunting energy right there
@samudrajs5409
@samudrajs5409 3 года назад
This series is really really helpful! Seeing Organic Chemistry in a whole different view!
@Swuirrell4days
@Swuirrell4days 3 года назад
Time to learn
@edward_myc
@edward_myc 2 года назад
Not "on ze zame zide" 😆 I will remember that for the rest of my life!
@asmitabhongade4858
@asmitabhongade4858 3 года назад
Nice video I love it
@magnesiumswift
@magnesiumswift 5 месяцев назад
9:45 I love this part lol, it's so cool, I'm actually shocked, never been taught in high school
@JS-vv3mo
@JS-vv3mo 3 года назад
woooohoooo......that episode was just more than a series fo me........that was amaazzzzziiiinnnnnnn........😍😍😍😍😍😍😍😍
@curtpiazza1688
@curtpiazza1688 2 года назад
Excellent!
@yahav897
@yahav897 3 года назад
Hey, CrashCourse, love the videos. I'm not sure if it's been discussed already, but are there any plans for a mathematics playlist? I'd like to see that.
@mr.scientifictemper3056
@mr.scientifictemper3056 3 года назад
great crash course of organic chemistry i thank the creators.
@kiranmanoj9250
@kiranmanoj9250 3 года назад
Kudus!! Great video I really wanted the same video while I was taking my University organic chem exam.
@rydinhasall3066
@rydinhasall3066 3 года назад
Very good
@victorvicentin900
@victorvicentin900 3 года назад
This was amazing!
@xSuperFryx
@xSuperFryx 3 года назад
If you are on a unicycle, your best bet is to practice from a wall. When you fall, the unicycle likes to shoot outward, which could hurt one of your friends.
@vishen7464
@vishen7464 3 месяца назад
thank you!!!!
@ahmedsalafap5898
@ahmedsalafap5898 3 года назад
Interesting and useful . Great job on animations of hyperconjugation 👍
@SuperAndrewlove
@SuperAndrewlove 3 года назад
Thank you so much! I really racked my brain trying to make the hyperconjugation animation as clear as possible as I thought a lot of the existing references on the concept were kinda hard to understand! I'm glad to hear you found it helpful! :D
@Arthur-ks4ho
@Arthur-ks4ho 2 года назад
@@SuperAndrewlove I love your animations. May I ask what program do you use to make them?
@SuperAndrewlove
@SuperAndrewlove 2 года назад
@@Arthur-ks4ho thanks so much! we use Adobe After Effects for all our Crash Course animations! If you want to see exactly how we do it, there are actually tutorials on the Thought Cafe RU-vid channel!
@Arthur-ks4ho
@Arthur-ks4ho 2 года назад
@@SuperAndrewlove thanks bro! ❤️ i would love to animate some reaction mechanics but i tried in adobe animate , what do you think? should i stay in adobe animate or should i switch to after effects?
@JS-vv3mo
@JS-vv3mo 3 года назад
thanks crash course team fo helping us in here....🙋🙏😇
@vrutipatel9539
@vrutipatel9539 2 года назад
Thanks ma'am 😇😇😇😇🌸🌸🌸🌸
@robintoonen8515
@robintoonen8515 3 года назад
Love that I am dutch and that there are easier way to memorize german. Entgegen --> tegen(over) ; zuzamen --> samen. Respectively against and together
@fukpoeslaw3613
@fukpoeslaw3613 11 месяцев назад
Es ist "Zusammen" verdammt noch mal ! Of is 't Nochmal aanmekaar geschreeft?
@margaretgodfrey9946
@margaretgodfrey9946 3 года назад
This helped me sooo much
@lewissiekaiqiang7665
@lewissiekaiqiang7665 3 года назад
because your explaination is very awesome
@rambles2727
@rambles2727 Год назад
For those confused by later episodes come back to this one and pay attention to markovnikovs rule
@JoelJimenezMerejo
@JoelJimenezMerejo 3 года назад
It’s the way my teacher was JUST teaching this topic today....
@ZucchiZ
@ZucchiZ 2 года назад
At this point, it feels like I am watching a sci-fi movie with many futuristic terms
@abhi-wi2mj
@abhi-wi2mj 3 года назад
Wohoo thanks for this
@user-ut9vt8gq9s
@user-ut9vt8gq9s 3 года назад
Excelent!
@veronikaz2509
@veronikaz2509 Год назад
how do you know the 1,2-shift will happen or happens?
@hibiscus1105
@hibiscus1105 3 года назад
I’m early!!! Yayy😍
@dillonmyers965
@dillonmyers965 3 года назад
7:13 that Pizzamas shirt of John lol
@DailyDoseDocumentary
@DailyDoseDocumentary 3 года назад
Interesting.
@DailyDoseDocumentary
@DailyDoseDocumentary 3 года назад
Isoprene rocks.
@zachariahayers6273
@zachariahayers6273 3 года назад
Simple mechanics and complex Mechanics Theory
@abdulwaseh8043
@abdulwaseh8043 3 года назад
❤️
@lewissiekaiqiang7665
@lewissiekaiqiang7665 3 года назад
I hope you can update the next episode quickly
@abhiprakash74999
@abhiprakash74999 3 года назад
Yay I missed u ❤️
@maxleibrecht7484
@maxleibrecht7484 5 месяцев назад
Where is the difference to the Wagner Meerwein Shift ?
@nihilrocks
@nihilrocks 2 года назад
Markovnikov’s rule states that the electrophile attaches to the most stable part of the carbocation which consists the “least hydrogen”. Can someone back me up…
@hetaeramancer
@hetaeramancer 2 года назад
When a protic acid (HX) is added to an asymmetric alkene, the acidic hydrogen attaches itself to the carbon having a greater number of hydrogen substituents whereas the halide group attaches itself to the carbon atom which has a greater number of alkyl substituents.
@selmangokdemir7181
@selmangokdemir7181 Год назад
In 4:01, why din't you name it as an alkene?
@kindlez98
@kindlez98 3 года назад
Haha, I knew about (Z) for zussamen but for (E) I thought it was Eigen as in unique because they were in a unique place
@adriansyahariakusumah7825
@adriansyahariakusumah7825 2 года назад
3:59 is it supposed to be (Z)-4-bromo-3-ethylpent-3-en-1-yne?
@ghaithballich5952
@ghaithballich5952 2 года назад
there are a triple bond so using the longest chain, which is hexane. However, I'm confused as why is bromo 5 not 6?
@adriansyahariakusumah7825
@adriansyahariakusumah7825 2 года назад
@@ghaithballich5952 oh i got it, thx. the chain starts from the "yellow no 1" to the "white no 2" (from upper right to the lower left). Bromo located on Carbon no 5 that double bound with Carbon no 4. In this case, Carbon no 4 attached with ethyl group. So that it is 5-Bromo.
@enamusanovic5808
@enamusanovic5808 3 года назад
WE NEED MATERIALS SCIENCE COURSE
@AvaaJoyy
@AvaaJoyy 10 месяцев назад
wait you ate this
@mybabyalulu
@mybabyalulu 3 месяца назад
Where are the dashes and wedges :’))
@darkmaninthedark5623
@darkmaninthedark5623 3 года назад
With English subtitle please🙏
@SoupLegion
@SoupLegion 3 года назад
lol thank you!
@itsarah
@itsarah 3 года назад
Hi! I hope everyone has an amazing day!💞 I make vidz
@fernandopineda5503
@fernandopineda5503 3 года назад
Could you do videos on animal science???
@the_roopak_lakhera
@the_roopak_lakhera 10 дней назад
IIT JEE
@andreameigs1261
@andreameigs1261 Год назад
I read that you have to have IDENTICAL groups on each side of the double bond for it to be cis or trans, but that's not what you are showing here.
@maxmusterman3371
@maxmusterman3371 3 года назад
Is this CC nomenclature grammar rules?
@theclashwarrior5148
@theclashwarrior5148 3 года назад
I’m early! If only I got a heart
@bvec97
@bvec97 3 года назад
00:07:25 PIZZAMASSSSSSSSSSS
@SuperAndrewlove
@SuperAndrewlove 3 года назад
heck yes! :D
@fchurca
@fchurca 3 года назад
First?
@hetaeramancer
@hetaeramancer 2 года назад
no
@vivi.arreola
@vivi.arreola Год назад
You lost me with the shift stuff ! I hate chemistry
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