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Identifies the absorptions of the following spectrum of 3-buten-2-oneJaoaAermuraca!2. identifies the absorptions of 2-octanolOH...

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Identifies the absorptions of the following spectrum of 3-buten-2-oneJaoaAermuraca!2. identifies the absorptions of 2-octanolOH

identifies the absorptions of the following spectrum of 3-buten-2-one Jaoa Aermuraca! 2. identifies the absorptions of 2-octanol OH


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The $^{1} \mathrm{H} \mathrm{NMR}$ spectrum of 2-propen-1-ol is shown here. Indicate the protons in the molecule that are responsible for each of the signals in the spectrum.

Here for the solution. Double bond equivalent Equal toe called toe 11 plus one minus 14 by toe, which will be equal to five for me. So one benzene ring may be present, So yeah, one benzene ring, maybe present the structure of the compound will be The compound will be this because the bending link may be present. No, After high idolizes, it will give this so for not after high idolizes. It will give this so mhm. The six proton sores speaking nearly ppm is due to these two metal proton and two protons is due to see it to single bone suitable bono protons. So the six protons so is speak. Nearly one ppm is, uh do do these to metal protons. The to okay, the two Pro Stones is do toe. Why CS two see devil bone or protons? Yeah. Uh huh. So in this double bond equivalent E called to 11 plus one minus 14 Vertical toe five. So the bending ring Maybe maybe President. The structure of the following compound will be this after high idolizes it will give this. No, The six proton So is nearly one ppm is due to these Mitchell protons. The two protons is due to CS two single bonds. It'll Bondo protons. Thank you

So continuing on with organic chemistry, we're going to try our hand at some problem solving hit, so we will try and identify some unknowns. So, given the molecular formula that we have C five h 10 to what we can calculate is the double bond equivalents that is one. So therefore we have one double bond in our structure. So from the protein anima, we have a three hydrogen environment triplet at about one ppm, meaning that the missile group attached to the methylene group. But we also have a two proton environment, triple at 2.35 ppm, meaning that one end off the CH two group is attached to the methylene Group. Lastly, the signal 2.35 ppm indicates that one of the ends of the CH two group is attached to the carbon. I'll also from the protein animal. We have a two hydrogen environment sextet. Now that's the splitting at 1.7 ppm. So we have a CH two group attached to the five adjacent hydrogen. So from the proton imov on the reasoning I've just given we can rationalize the structure for a beauty Rick acid that looks as follows And then we can take a look at the IR spectrum, and we have an absorption at 17 40 wave numbers indicating the CEO stretching oven Esther Group. Then we have a stronger broadband that is absorbed between 2250 wave numbers that is used to see single bond. Oh, structuring. We also have some peaks 954,850 wave numbers. That is a result of our CH stretching frequency, but and so from this we can rationalize structure for meth, our beauty right on them. It'll be a tree and goes acid Catalans hydraulic assist in the presence of a proton saucer from Butte, Terek acid and methanol.

So here we are looking at some spectral. So starting off with c. five H 1002. We thought we basically the most important information that we get from the I. R. To let it to these huge match Is receiving some sp three carbon patron bonds. Okay. That are showing up Below the 3000 wavelength region. So we see a lot of peak there and they just mean that we have a bunch of all cane. Okay. Then what we also see is um the 1700 we've length is a carbon Neil functionality. Okay so it's also quite useful. We have two oxygen's in the molecular formula. So we can I already assume a carbuncle gas suit? Go ahead. Yeah. Not a car book called acid and Esther. Sorry. Okay so there is no hydroxyl. The IR tells us that there's some absence of a hydroxyl because hydro axles are one of the most evident signals on an I. R. And it's clearly missing. So there must be an ester cannot be problems like acid really. Any kind of a any other kind of the terminal. Okay. And also it's mentioning as a catalyst which is quite, you know, a little characteristic investors. Okay. And I'm moving on to the one each of them are that gives us quite a lot more information. So what we basically get is at 20 pm, approximately two PPm. And then again three ppm. The accordingly we get triplet habitat and then another triplet. Okay. And if we look at their integration values, basically see that here we appears that has an education value of two units. If you're looking if you're counting squares on the graph, two and then this one has 3. This is the integration okay with the integration basically tells us this number of hydrogen atoms. So now this is sort of making sense. So here We if it has a situation of three, We can see that it has three Basically three protons here. Okay, so this is a method group. Okay, because they're all identical. So three of them to call hydrogen is definitely a muscle. Okay. And what this triple it is telling us is the metal is adjacent two um us align. Okay, so here's some lingo that I suggest you pick up. That's really helpful with and um are Okay, so methylene means the siege too. Okay, so that's it. No, that's pretty standard there. Okay. So here because they have integration values of tubes, This is what I like to call siege 2s or method means. So here if this one is the habitat, that means it this muscle line has habitat or are not habitat. Just a heads tent Tricky word, but that means it has five neighbouring hydrogen. Okay. Which makes sense to five there. five. So, we can tell that this hex tet is beside The Muscle and the 2nd methylene. Okay. And if this was a triplet, you can then say that this methylene is adjacent to maybe a tertiary carpenter or an oxygen since it has known neighboring hydrogen is on the other side. Other than the other. Halloween. All right. So with that we've gathered a lot of information there. Yeah, well, we basically know is that our compound looks like this? We have I'm ethylene adjacent to a methylene was adjacent to a muscle. Right? We're just not too sure what's on this side. Okay, so now we need to look at this mechanism for acid A delicious. So we can either have a compound like this where Okay, three carbon there. So, too there or it could be the other way around where three carbons there adjacent to the carbon Neil like that for the oxygen is facing there. Okay so one thing that we need to note about, if we were to run, you know, acid hydraulic Asus as we form some car box with acids. Okay so and we would form it basically on the oxygen, say so this is what's gonna get cleaned off. Okay. For us to form let's see the gas it or this longer kind of. Well let's just do that again. Yes. This view to know what acid. Okay, so as you can see this is clearly the compound that you saw in the NMR. Okay. The methodologies into a mathematician to another mythology city. Some kind of it Quanta Neri carbon. And so then it must have derived from this Esther. Okay, so here's the compound for R. c5 age 10 oh two. So I hope this wasn't too tricky if you're not too familiar with each other tomorrow, But and yeah, it was sort of a giveaway that it was an ester when they mentioned as its allies. And just know with the Multi to 2, there was a carbon on the I. R. Okay. So then we just have to really understand this, hmm, are to know that this is a kind of structure, right? Kind of the structure of the car looks like acid. So it only makes sense for it to be this way. Okay.

Yeah, The problem. Number 79 to calm bombs. Who's Yeah, Tomorrow on my hospital values and even inspectors anyone? They had to identify them. Hubble's last one empress is 114 114 Andi, The other signals 71 who killed 43 in 27 40 days. Obey. Speak 27. Yeah. Choose a kid. A group due to the 1700 signal animal foods. Mhm. Things to do is to two protons with this one on. This is a triplet and multiply it on a little plate on this value the doctor value on the speakers around 2.3, indicating it is attached where he took group. So this should be Is he? It's three c x two. See? It's too group. They should be arrested with a group. If we can calculate the mass of the world is we'll find that this is, uh, 15 girls 79. Plus this is 43 43 breasts. Mhm. It will be totally 71. So 100 Total value. 114 minus 71. It's three. What is leaving, which with no other signals we can Controlling that. This it is a symmetric molecule with exactly the same order, they said. Also, see a student safety, of course. No, not everyone suburban, the second commonly having a mask when you have 1 54 on there is an implicit too big at 1 46. On the peak is approximately one third of the Empress speak, indicating it is seclusion at convincing crooner's. Certainly the I ask Spectrum Shoes Excellent at 1700 indicative of the Taliban a group. And there is no striking revelation of C H in the range, UH, 2700 something showing that it is not an alligator Animals that reinforces English anymore shows single it, but four point seven $4.7 is English off to each. That means that program should be. It is so long field for points. Having square downfield, she has to sing like means that this year's too much filters to win extraordinary. The other animal signals are those of dramatic 7.6 to 8 winter. There are quite programs in this region in the ratio do is to do is tow one. That means it should be more often people debating now recalling all these together. You get this culture on the molecule. See everyone home. C h two. Yeah. This is the Yes. The month spectrum contains very speak of 105. This corresponds to this part of you, Marty, which is called stabilizers, right? It's got a ideas, similar agency or group. So this is the structure of the molecule.


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