Propose a mechanism for the following reaction.

Question

Propose a mechanism for the following reaction. <

of reaction>

Accepted Answer

Hey, everyone. And welcome back in today's video, we are going to learn how to draw a suitable mechanism for the cleavage of ether. Shown below. We may start by drawing our ether. And as the problem suggests, we're treating it with excess of hydropic acid. And we see that we have a ring opening reaction because the reaction starts with an excess of hydropic acid. Recall that hydro brom acid is a strong acid. So it's a perfect protein donor, right? We may just expand the H pr bond. And we understand that in the first step, we have a protonation step because the lone paraoxon can get easily proton. So we labeled this as our protonation, stop. The lom pair anoxia will get proton at followed by the loss of the leaving group bromite and iron. We may now draw that proin in intermediate. So nothing really changes. We are just showing that this oxygen atom now has a formal positive charge with hydrogen atom bone. It because there are three bonds around auction, right. So it must have a formal positive charge. Now, the next step is the nucleic attack stop. We call that in the first step, we have produced that bromite anion. So that should be the nucleic attack, stop the brome and iron formed previously will act as a new file. And the reaction that we're performing is an essence to type of a reaction. The two positions which are electrolytic centers directly bonded to oxygen are equivalent because this molecule has an internal plane of symmetry. So it doesn't really matter which position we attack. Let's suppose we show our mechanism with respect to that position. So the bromate anion attacks and based on the rules of an su mechanism, this is followed by the loss of the leaving group. And this is where we are opening the ring. We are now ready to draw a 12345 member chain, right? That'd be 12345. And we understand that position number one has an alcohol group bones. So we are going to add a wage and the final position contains bromine. So we are just going to draw up, bro, this would look good for us, but notice that it says excess of hydro brom acid. So due to the fact that this auction has lone pairs, it can easily get protend once again. So let's see what's happening. Another equivalent of hydropic acid is used here in another protonation step. So the pair on oxygen here can get proton once again, followed by the loss of the living group. And we may say this is another step of protonation that's pronation, we are going to read to our proton intermediate. Now it will be H2O with a form of positive charge because that proton has been abstracted. And now the bromite and iron formed in the previous stuff will again act as a new file. So the next stop is the nuclear attack stop just as we did before we may say that we are performing, performing that nuclear like attack stop. Another essence to reaction, the nuclear power will attack that electrolytic carbon atom. And the nuclear file is the bromite and ion which at then we have the loss of the leaving group and we are forming our final product. We may essentially say that instead of age two, we are now attaching bromine to that electrolytic carbon atom. And now this is our final structure. In addition to that, we may say that the other product that we are forming is water, right? Because we had the loss of water. So these would be our two products. Now, let's review all of the steps that we did. We started with our ether, we said that the first step is a protonation stop due to the presence of that lone para andox, it gets easily protend by hydropic acid and the Perin intermediate can participate in an essence reaction because now we have a strong nu which is bromide and it can attack the electrolytic position to open the ring form the intermediate product that is protend once again after the protonation stop, we have another nucleic attack stop. And this is our final step when we are forming our dibromm substituted ALCA, right? Kill Halite plus our byproducts, which is water. Now, the correct answer choice to this multiple choice question is b however, if you have any questions, don't hesitate to leave your comment down below in the comment section and thank you for watching.

Propose a mechanism for the following reaction. < of reaction>

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