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Question 4Determine the stereochemical relationship between the two molecules seen below: (Q7 from exam picture)BrBr HCiEnantiomersDiastereomersSame MoleculeConstit...

Question

Question 4Determine the stereochemical relationship between the two molecules seen below: (Q7 from exam picture)BrBr HCiEnantiomersDiastereomersSame MoleculeConstitutiona isoicrsNextPreviousS[e3 pts

Question 4 Determine the stereochemical relationship between the two molecules seen below: (Q7 from exam picture) Br Br H Ci Enantiomers Diastereomers Same Molecule Constitutiona isoicrs Next Previous S[e 3 pts



Answers

Consider the following two molecules: Which of the following best describes the relationship of these two molecules? (a) Enantiomers (b) Diastereomers (c) Conformational isomers (d) No stereochemical relationship

So we're continuing to work with Stereo is a MERS and so this is defined as the branch of chemistry that is concerned with a three dimensional arrangement of atoms and molecules in space and how this effects are chemical reactivity. So starting with example, A to the compounds are the same and they have the S configuration. If we rotate them, you can see that we have the same compound moving on to the second example we have financial mus, so these are non super impossible mirror images. So that example is Dia stereo Eisner's. They are not super imposible, non mirror images. So for our next example, we have the one s thio ask configuration and now the same compound. Just simply rotating one of them will reveal that to us. Next, we have a pair off dia stereo. I summers So we have the two configurations the one Earth to us one our to our next we have constitutionalism er's So this means that we have the same molecular formula A different arrangement of atoms, different connectivity of atoms mixed you up, Dia Steri rice. Once again following this, we have a non Chalmers. Next we have same compound. Next we have different compliments of the same molecule. Almost a the end. Now with our list, we have financials. So with this one that was came I missed a Kyra page again. So we have Dia story. Oh, is a MERS. Well, we have the same compound with and we have diced terrorism er's following And we have constitutionalism er's after and we have oh, peaky left. So we have diced story I summers, Pete, we have the same molecule as we do for Q on both have no Kyrill centers.

Let's identify the relationship between molecules and each of the following peers. For a the two molecules are identical for be two molecules are a constitutional I summers for C. There is no relationship for D. Your constitutional is MERS. And for E, they are Steri oysters.

Let's talk a little bit about ice, summers and relationships between molecules. So there are two different types of higher classifications of ice summers. So the first type of classification of ice summers are constitutional ice tumors. Now constitutionalism er's are molecules with the same formula, but different structures. Our second type of ice summer is a stereo is, um er. Now a stereo is, um ER is part of a larger subgroup of ice MERS in which a molecule has the same formula and the same type of structure, but a different configuration or a different confirmation. So let's go ahead and look at some different structures and determine what type of ice MERS they are or if there's no relationship between the molecules. So our first structure. Here we have C H three see, which is double bonded to an oxygen, as well as a hydroxyl group, our second molecule. Here we have CH three bonded to a carbon, which is bonded to hydroxyl group as well as double wanted to and oxygen. So let's take a moment and look at these molecules here. If I were to flip this molecule around, which means we'd have a double bonded oxygen with a carbon and then a ch three and an O. H and then rotate this molecule counterclockwise. We would have the same molecule. So therefore this first one is the same for a second example. Here we have a ring. We have a five sided ring with a hydroxyl group and a double bomb. And then we have a five sided ring with a oxygen double bonded to it. So obviously these molecules are not the same, which means that we either have no relation. Constitutionalism, er's or stereo is a MERS. So in terms of determining they're types of ice MERS, let's determine their formulas here. So we know we have C s. We have HSM you owes. You're sees with ages and their past. So this has 12345 carbons. This has 12345 card. This one will have 2456 78 hydrogen zones. This one will have 246 eight hydrogen, one oxygen and one oxygen. They both have the same chemical formula. Okay, so then they must be either constitutionalism, er's or stereo. I summers. Now the definition of a constitutionalism er is a misnomer that has the same formula but a vastly different structure. Therefore, these air constitutional I summers okay for our third structure. Here we have another five cited ring, but we're going to start to get a little bit tricky here. So on our five sided ring, I'm going to redraw that because that does not look great. Okay, on our five sided ring, we have some directionality within our methyl groups. Here we have a methyl group coming out of us and a method group being sent to the back of the page. Whereas on this second one, we have a method group going into the page on a method group coming out of the page. Now, this requires some directionality thinking here, if we were to flip this molecule so I'm going to use this curly shape to say flip, would these two molecules be the same? So imagine a carbon coming out at you if you hold your hand facing your face and you were to flip your hand over. Is it the same? No, You're looking at your palm and then now you're looking at the back of your hand. If you were to stick a finger out to represent the seat, the methyl group, and then flip it out. You have a method group facing you, and then now Method Group is a way. Therefore, these are called stereo stereo ice summers for our fourth group. We have a huge aromatic molecule here that I'm going to go ahead and draw some Mexicans for. If you're hexagons, look kind of funky now, don't worry. After many years of organic chemistry, you will become a hexagon pro. I promise. Okay, so we have a double bond double bond, double bond, double bond, double monitored oxygen, oxygen. We have double bond, double bond, double one, double bond, double 12 and oxygen double wanted to an oxygen. So visually, these look like constitutionalism. Er's. However we always it's good practice to double. Check to make sure that these molecules are actually the same. So one carbon. 23456789 10. 123456789 10 Carbons. 123456789 10 Carbons, hydrogen. Okay, one hydrogen, two hydrogen, three hydrogen four, five, six, 78 nine. Hydrogen into oxygen's Here we have one. I was just kidding. It's gonna be eight. Sorry about that. Actually. Every count. 12345678 Yeah. 123 for no, no hydrogen here. Five, six, seven, 123456 six. When I was wrong here again, there's gonna be no hydrogen in these corners. Well, I'm not even looking at my notes. And you need to look at my notes when I do this six and then two. So these are, in fact, constitutional ice MERS. Okay, last structure. We have a four sided ring shaped kind of like a rhombus. And always remember, when you see rings that are less than five sides are you are getting significantly more strain on these bombs here. So if you think about this as the number of sides decreases, strain definitely increases. However, is the number of side increases the stability. We'll also decrease because if you have like a 45 sided ring, it's more likely to break. So look for that six sided sweet spot. But rings can really be any side if you have the right Kyra Ality as well as the right monastery. Okay? Besides the point. So we have a facing up roaming and facing down, bro. Mean and then we haven't up down broking. These molecules are the same, but they're shaped differently. Therefore, we're gonna have constitutional ice allies.

This question as us If these compounds are the same compound Ah, in Cairo in and tumors eso there's one way that we can meet. The marriage is, um, try to see the arrangement off the subsea tone on the same cab on. So keep this center Attn. The same position and we can start labeling of the rest of the molecule with the head through. Adam ah has the highest priority would. So this is one. This is, uh too. And this is three, so you can see that. One, 23 It's got a, uh and I club for twice. And this is one again too three. So 123 This is Hawk Wise. The source. You can see that the arrangement off the city wants. It's like a different, um, arrangements. And so these are in anti. Almost now. In this case, Clariant will be one A wages too. Three. So want to three. Is this one? This is again going to swan always too. This is 3123 So you can see that is in the same order. So this is the same compound in this example. Now they are both cabin, but this cab on connected the 23 other cab on this cab on connect only two. So this is one. This is two and this is 3123 It's in this direction. So again, this is one. This is two. This is three 123 As you can see, these are two opposite direction. So this is an anti almost.


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