Select 18) Based on the products, the following equation...

Select 18) Based on the products, the following equation would represent what type of reaction mechanism? A) SN1 Br B) SN2 C) E1 D) E2 + N3 N3 E) None of these choices Select 19) Based on the starting chemical and the product, the following reaction is an example of which type of mechanism? Br A) SN1 B) SN2 C) E1 D) E2 E) None of these choices.

Transcript

00:01 Okay, we've got a pretty long multi -part question here.

00:03 The first one is, which reaction mechanism is most likely in the case of a secondary halo alkan? let's give an example.

00:12 And a bulky hindered base.

00:14 So let's give another example, like a tebutoxide, for example.

00:19 Sodium t -butoxide is a classic bulky -hindered base.

00:22 And they want to know what's the most likely mechanism.

00:26 Well, a bulky -hindered base, they're not strong.

00:30 Nucleophiles right so it's not going to be sn1 and it's not going to be s and two basically also this is secondary which isn't super favorable for sn1 or favorable for e1 right if we've got a strong but bulky base we're typically looking at e2 and so that's going to be the most likely answer e2 all right two which of the following compounds is most likely to induce an e2 reaction with minimal competition from other e and s and mechanisms.

01:07 We've got some options.

01:08 We've got straight up methoxide.

01:13 We've got t -butoxide again.

01:16 Well, that's a good hint, right? that's a classic bulky base, and we just talked about how much of those favorite e2 reactions.

01:22 We've got hydroxide, and we've got cl minus.

01:28 Well, the issue is that hydroxide is a very strong base, but also a very strong nucleophile.

01:33 Chloride is not a strong base at all.

01:35 It's a strong nucleophile, so these are right out.

01:40 And now we've got methoxide, which is also a strong nucleophile...

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