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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

Assign R or S configurations to the chirality centers in the following molecules (blue = N)

Ribose, an essential part of ribonucleic acid (RNA), has the following structure:

(a) How many chirality centers does ribose have? Identify them.

(b) How many stereoisomers of ribose are there?

(c) Draw the structure of the enantiomer of ribose.

(d) Draw the structure of a diastereomer of ribose.

(S)-1-Chloro-2-methylbutane undergoes light-induced reaction with Cl2to yield a mixture of products, among which are 1,4-dichloro-2-methylbutane and 1,2-dichloro-2-methylbutane.

  1. Write the reaction, showing the correct stereochemistry of the reactant.
  2. One of the two products is optically active, but the other is optically inactive. Which is which?

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

Draw both cis- and trans-1,4-dimethylcyclohexane in their more stable chair conformations.

(a) How many stereoisomers are there of cis-1,4-dimethylcyclohexane, and how many of trans-1,4-dimethylcyclohexane?

(b) Are any of the structures chiral?

(c) What are the stereochemical relationships among the various stereoisomers of 1,4-dimethylcyclohexane?
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