How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(a)

Question

How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(a)

(a) Fischer projections of two carbohydrate pairs for identifying structural isomers, enantiomers, diastereomers, or epimers.

Accepted Answer

Welcome back, everyone identify the relationship of the given molecules as structural isomers in an tumor ditherers or omers classify each as the D or L isomer if applicable. Now, first of all, we want to make sure that we have the same molecular formula for each structure. And instead of counting those atoms, we can just see visually that the first one is an aldehyde group, then we have 1234 carbon atoms which have one hydrogen and one hydroxy group and the final carbon is chtoh. So they basically have the same molecular formula right now, can they be structural? Is the answer is no because they have the same linkage of atoms. As we can see, we have the same six member chain with exactly the same atoms bonded to each carbon. Now, can they be non tumors? Well, we simply want to check if they are non superimposable mirror images of each other. Now, the first carbon within carbonel is not chiral because it's sp two hybridized. But then if we look at the facial projection, we can see that the left side is the reflection of the right side. So our chiral positions are reflected right? And essentially, we can state that yes, they are in an tumors because they are non super imposable mirror images of each other. And we know that simply because there are four chiral centers, if we have a structure that does not contain an internal plane of symmetry, its mirror image will always be an Inan tumor. And basically, we can move from here. If they are in an tumor, we want to assign the D and L assignment to each structure. Let's begin with the first one. And let's recall that the welfare part is to identify the hydroxy group bonded to chiral position that is farthest from carbonel. So if we locate carbonel and move down the very final chiral carbon would be carbon number five. And we went to identify the position of the hydroxy group. If that hydroxy group is under right, then we have ad in an tumor. If that hydroxy group is on the left, then that gives us an L in an tumor. And therefore, we can say that the first structure would be the D in an tumor. And the second structure would be the L in an tumor. So we can state that these structures are in an, that's our first answer. And also structure number one is the D in an tumor structure. Number two is the L in an tumor. That would be our final answer to this problem. Thank you for watching.

How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(a)

Verified video answer for a similar problem:

Key Concepts

Structural Isomers

Stereoisomers

D- and L- Isomers

How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.(a)

Verified video answer for a similar problem:

Key Concepts

Structural Isomers

Stereoisomers

D- and L- Isomers

How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(a)