SN2 Practice Questions

In this video I'm going to go over some of the most typical SN2-related questions you might see on the exam. I'm also including some tricky ones so you know what to be prepared for.

00:00 Intro and review of the SN2 reactions
01:48 Question 1 - predicting the products
06:02 Question 2 - tricky questions
11:07 Question 3 - rankings

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[ulyssecordier]

Thank you for this video. I had a lot of trouble finding corrected exercises like yours. It is through practice that we understand best, so thank you!

[lucifershome]

you might actually be my new fav orgo youtube tutor. you're so saving my grades thank you!!

[Lubetza]

Your video's are top notch. Very rarely I disagree with any of the mechanism you propose. I will highly recommend them to my students. All the best and thanks.

[somonpierregahimbare]

Make more of these exercises because are so helpful. I enjoyed listening to your explanation is so incredible and full of information. Thanks

[swayambhuvmitra]

brilliant in question 2 (iii) was asked in my exam and i did it correct thank you sir

[sewing]

Thank you! I was confused about leaving groups on cyclohexane rings but your example question cleared it up immediately. These videos are a gift!

[rudranarayandasmahapatra]

Seriously, Very Lucid way of teaching.... Really want to see videos on all mechanism types with all the anomalies.

[LeenaShaheen-zv]

For question 1 at 5:52, why did we change the configuration from wedge to dash, if the carbon with the leaving group isn't a chiral center?

[rahmasafirabilqis]

omggg thank u very muchhh, very easy to understand for me

[vanessagaleano]

Thank you so much the ranking problems really helped!

[BriBear]

At 12:53, looking at A and C, I think C should be second place and A should be third place. When looking online at the relative rates depending on the alpha and beta carbons, a secondary alpha carbon (C) has a relative rate of 0.008, but a tertiary beta carbon (A) has a relative rate of 0.00001, much smaller and nearly neglible.

[AliRaza-kvh]

can you please make a video of this topic from Jerry March ❤

[flaffy]

Very good video but I am confused on one thing. Why are axial positions more reactive than equatorial positions for nucleophilic attack? I saw on cyclohexane chair lesson that axial positions were more sterically hindered and equatorial positions are favored because they are less sterically hindered.

[HasanAl-Mosuli]

9:35, when I drew the chair conformation I put the isopropyl group on the axial position and a result the meta position iodine was the one in the axial position for me. Is there a reason why it is turning out wrong for me?

[reemtaleb]

without doing the chair conformation for Q2 part 2 why did we pick the solid wedge that was pointing down? I didn't get it if you could re-explain that would be highly appreciated 🌹

[sahiresperant]

Hi there! I have a question, for the ranking problems at the end, I for question number 2, I thought you said no sn2 on sp2 carbons—doesn’t that mean that the 1-chlorobut-2-ene would be the least reactive?
Thanks!

[edgarlaureano]

For Question 3 of the rankings, how could you deduct that the Isopropyl group is in an Equitorial position? Thank you!

[cedmarobles]

hello for example #1 we don’t have to write the specter ion in our ending product after the cn (cn + I-)?

[spurti]

Ohh only bromine is a good leaving group at clip 5:53 because it is more electronegative than oxygen according to linus pauling scale on the periodic table.

[dwirevanityas]

what is carbon position 'allele, equator, axial'?