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1. Draw the Product of the Following Reactions: marks)H,o(CH;) CHCH=CHz2 H-_BrSx2~CH;HyCAch...

Question

1. Draw the Product of the Following Reactions: marks)H,o(CH;) CHCH=CHz2 H-_BrSx2~CH;HyCAch

1. Draw the Product of the Following Reactions: marks) H,o (CH;) CHCH=CHz 2 H-_Br Sx2 ~CH; HyC Ach



Answers

Draw the products formed in the crossed aldol reaction of phenylacetaldehyde (C6H5CH2CHO) with
each compound: (a) $\mathrm{CH}_2(\mathrm{COOEt})_2$; (b) $\mathrm{CH}_2(\mathrm{COCH}_3)_2$; (c) $\mathrm{CH}_3\mathrm{COCH}_2\mathrm{CN}$.

Let's predict these products well for the first one. Yeah, this will produce the most stable halo al cane, and we'll end up with this molecule now because of the mechanism. This involves carbo cat ions, which means that the stereo chemistry is going to be kind of jumbled. And there's no anti RSA. In addition, it's just to receive Mick jumbled mix, because s. And if you remember from sn one reactions, that's kind of the same, um, kind of the same type of reaction here because of carbo cat ions For this one, Um, for the hydrogen, the hydrogen will always be added Sin Edition So we can have this or we can have its own and humor, which would be this. And then the hydrogen would be here or here. Either they're going to be dashes or wedges, but they're going to be the same as each other for this one. Well, we just have a, um, alcohol being added to the least subsequently stable carbon. And this one isn't going to be kind of, um, this one won't really have, like, stereo chemistry with each other or something like that. So this is kind of an unknown. Kind of, um, what's the word? Unknown stereo chemistry. So we're going to say we're going to make this a wedge and we're going to make this a wedge, and we're going to say, Plus an ant humor. And we're also going to say, Plus Dia steamer, And this will take into regard every consideration that we have because there's two stereo centers. So we have to worry about in and tumors and die astronomers. And finally, we have br two ch two c l two. This is going to be an anti edition of bro. Mean So we'll have one with a wedge and one with a dash. And we're going to have its anant humor as well, which will be the top one with the dash and the bottom one with a wedge.

So what are we going to get if we react this carbon eel? They're beautiful. I mean, so of course this nice region is going to attack. We're going, Tio, lose water and you'll end up for replacing that oxygen with a nitrogen carbon double bond. And you'll end with this. I mean, he can generate an mean only when you have a primary a mean and he can lose two of these hydrogen tze with this oxygen in the case of water. But if we were to react with Dia Philomene, then of course, this is going to react, but you'll only lose hydroxide and you'll be left with this The mini um ion, Of course, it's a mini, um ion is not very stable at all, So we'll go through a tot memorization to generate this in. I mean so again. When you have secondary, it means you'll generate the Inamine we have primary. It means you'll generate the mean And if you have a tertiary, I mean, you'll have no reaction at all. Next we have this and hydride, I knew if we react this with our beetle mean, then we'll just generate our Amit. Yeah, will lose this acid and generates this. Um, I'd In this case, the same thing can occur with our secondary. I mean, because again, we're only needing to lose one of our hydrogen atoms. So will generate a tertiary Hamid and anhydride has the same reactivity as an easel Chloride. It's, of course, where their beetle mean and this pencil chloride, we'll simply generate the secondary and lied. And if we use the awful mean will generate the tertiary, Um, I'd

Predict the major product off additional. HBR drew fallen Arkin's and the direction proceeds through a crab, dying for him on a tertiary carbon So this couple will receive berman being reaction proceeds. Flu comeback Italian form a nursery carbon so that carbon received woman See, the reaction can proceed for either secondary complicate time here or secondary capital time there. But this convict ABAC Italian. At this couple, I got into the tertiary one but shifting H minus from the next carbon. It generates tertiary crumpacker time at this carbon and this carbon will receive berman.

We're taking a look at the major and minor products that we may fall. So in the first part we see that our kids can undergo electrical like edition reactions with H B R on what we form is the following. So we have to products here, and these are and equal populations in our reaction mixture. When products are forming in the second part that we have here, Ah, major product is as follows. So by Major, I mean that this product will be greater in concentration than any other structures that may be present. So in Thesafeside example, what we generate is another major product that is Burma. Nated, that is three Bruno to three. Damn Ethel Hexen. In the final example, what we form is one Bruno Bonney thaw cycle repenting.


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