Question

Alanine, an amino acid found in proteins, is chiral. Draw the two enantiomers of alanine using the standard convention of solid, wedged, and dashed lines.

   Alanine, an amino acid found in proteins, is chiral. Draw the two enantiomers of alanine using the standard convention of solid, wedged, and dashed lines.
 
Organic chemistry with biological applications
Organic chemistry with biological applications
John E. McMurry 3rd Edition
Chapter 5, Problem 3 ↓
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Alanine, an amino acid found in proteins, is chiral. Draw the two enantiomers of alanine using the standard convention of solid, wedged, and dashed lines.
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Key Concepts

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Enantiomers
Enantiomers are pairs of molecules that are non-superimposable mirror images of each other. These isomers have identical physical and chemical properties in an achiral environment, but they may interact differently with other chiral substances, such as biological molecules. Recognizing and representing enantiomers is crucial for understanding stereoselective reactions and the behavior of molecules in biological contexts.
Stereochemical Drawing Conventions
Stereochemical drawing conventions are methods used to represent the three-dimensional orientation of bonds in a two-dimensional diagram. This includes the use of solid wedges to indicate bonds coming out of the plane toward the observer, dashed wedges for bonds going behind the plane, and solid lines for bonds in the plane. These conventions are important for accurately depicting the spatial arrangement of atoms around a chiral center.
Chirality
Chirality refers to a property of a molecule in which it cannot be superimposed on its mirror image. This lack of superimposability usually arises from the presence of an asymmetric carbon atom, which has four different substituents. Understanding chirality is essential in chemistry, particularly in biological systems where the orientation of molecules can significantly affect their function.

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Transcript

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00:01 So they give us the structure for alanine, which they tell us is a chiral molecule.
00:08 And they want us to draw two anantomers of alanine using the standard convention for solid and wedged and dashed lines.
00:18 So let's go ahead and draw one of them to start.
00:24 So in the center here, we're going to have this carbon.
00:27 So i'm going to base everything off this carbon right here.
00:31 So it's going to have a nitrogen attached with...
00:35 Two hydrogens is going to have a carbon coming off of it.
00:40 It also has a hydrogen attached to it.
00:46 So let's just put that hydrogen over here.
00:49 And then it has a carbon attached over here on the right.
00:54 And then it has two oxygens.
00:56 Well, anytime you see co2h, that's normally just a carboxylic acid.
01:00 It would look like this here.
01:04 So if we want to draw to an antimer, well, let's just go ahead and make this nitrogen here.
01:14 So remember, wedges mean they're facing towards us, and dashes means they're facing away...
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