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Chapter 5: Q3P (page 120)

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.

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01

About alanine

The chemical compound used for protein biosynthesis is called alanine. This compound is an amino acid that has amine and carboxylic acid groups.

02

About the structure of alanine

The molecular formula of this compound is C3H7NO2. The structure is given below.

Alanine

03

About the enantiomers of alanine

The names of the two enantiomers of alanine are L-alanine and D-alanine. The structures are given below.

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Most popular questions from this chapter

Ketones react with sodium acetylide (the sodium salt of acetylene,Na+-:C≡CH) to give alcohols. For example, the reaction of sodium acetylide with 2-butanone yields 3-methyl-1-pentyn-3-ol

(a)Is the product chiral?

(b)Assuming that the reaction takes place with equal likelihood from both Reand Sifaces of the carbonyl group, is the product optically active? Explain.

Which, if any, of the following structures represent meso compounds? (Blue = N, green = Cl.)

Cis-1,2-Dimethylcyclohexane is optically inactive even though it has two chirality centers. Explain.

Draw the structure of a meso compound that has five carbons and three chirality centers.

Orient each of the following drawings so that the lowest-ranked group is toward the rear, and then assign R or S configuration:

a.

b.

c.
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