Sn2 Reactions

Sn2 Reactions

[alessandrofelicetti]

Yeah, okay...So he can't say nuclei...but I can say nuclei, and not have the faintest clue about them. Sal can do chemistry. I can't. That's why I'm here.

[SJ-igjc]

Give him a break on the nucleuseses. We're sciencers here, not languagers.

[imkaneforever]

You're changing the world for the better. Free education, you deserve a Nobel Prize. Also, I really like how you personify the molecules. It really makes me feel like I have a personal bond to them. :)

[TyTimeIsAwesome]

Attack is a sufficient word. I remember my ochem teacher drilling to us the concept that SN2 is a backside attack in class and 4 or 5 immature students couldn't stop laughing. Still kinda funny, ha.

[johnguillen]

The confusion I had in class with SN2 is now clear by watching this video. Thank you.

[N-pn]

Thanks. And also inversion of the stereochemistry around the central atom for SN2 reactions. Happens in one step. Different from the SN1 reaction that happens via a carbocation intermediate. SN1 occurs in two steps while SN2 happens just in one.

[Palmars]

@s05bf1c5
yea.I think that the oxygen giving up an electron is because H20 water already has a complete octet, since it's full and if it gains another electron it will violate the octet rule.I'm not sure.
Secondly, Br is more electronegative so it's already giving C a partial +, since BR is a good leaving group, Br leaves.Then OH- attacks the C that has a partial +. OH- is the Nucleophile, it likes nucleousses that have positive charges. Since it's a Sn2 reaction, everything happens in one shot :)

[yvescdl]

Gosh how I'm so thankful to you! I've watched other vids for sn2 reaction but this video explains it best.

[Cmeclarity]

You are really doing students a service!

[juniorable]

why does the "whole" Bromide leaves when recieving the electron from the hydroxide?

[busterhyman]

i did an sn reaction on a secondary halide iodoalkane and the rate was almost instant.
we concluded this was an sn2 reaction with psuedo first order kinetics dependant on the concentration of the nucleophile.
nice illustrations but it can be much more complex than it appears.

[SourceOfRevenge]

I thank you, your vids made it possible for me to explain Sn2-reactions to a couple of teenage girls i've spent about a month trying to teach em about organic chemistry, i more or less rephrased it to a story about a guy and two girls (H and Br)

[Tiibiis]

really thanks this was awsome! This and your atoher videos explaine things better then my teacher does and i am so happy that i found yor videos its going to help me alot !

[vitalivb]

what would happen, if you had a primary or secondary carbon ?

[busterhyman]

the tertiary carbocation is most stable but it would sterically hinder sn reactions so sn2 reaction only applies to primary or secondary carbons.
they are slower on primary carbons.

[kevinreusch]

seriously cant thank you enough for your chem vids. helpful id be failing ochem way worse then i am right now without these videos

[AdasiekkkTrzeci]

I'm not a fan of using double-headed curly arrows and saying that they show that a molecule gave an electron to another atom.
Double-headed curly arrows, by convention, show movement of a pair of electrons. For example, we are moving a lone pair of electrons into a bond between two atoms.
The explanation used in this video will make it very confusing for when radical mechanisms are considered, where a single-headed arrow is used to show movement of one electron.

[lunariot]

I appreciate your guys' vids.  I like the enthusiasm you speak with.

[Crystal-hplf]

When people ask me what university i graduated from ill just say ''KHAN ACADEMY''

[Palmars]

I don't understand. At 2:20, why would oxygen give an electron to the hydrogen if he is more electronegative, he wants electrons, and then the oxygen gets a partial positive charge? I'm confused..