Textbook Question
Which of the following pairs of compounds could be separated by recrystallization or distillation?b. and
Ch.5 - Stereochemistry
Wade9th EditionOrganic ChemistryISBN: 9780135213728
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 5, Problem 5
To show that (R)-2-butyl (R,R)-tartrate and (S)-2-butyl (R,R)-tartrate are not enantiomers, draw and name the mirror images of these compounds.
Verified step by step guidance1
Identify the stereocenters in each compound. (R)-2-butyl (R,R)-tartrate has three stereocenters: one in the 2-butyl group and two in the tartrate moiety. Similarly, (S)-2-butyl (R,R)-tartrate also has three stereocenters.
Draw the structure of (R)-2-butyl (R,R)-tartrate, ensuring the correct configuration at each stereocenter. The (R) configuration at the 2-butyl group and (R,R) configuration at the tartrate moiety should be clearly depicted.
Draw the mirror image of (R)-2-butyl (R,R)-tartrate. This involves reflecting the entire molecule across a plane, which will invert the configuration of each stereocenter.
Draw the structure of (S)-2-butyl (R,R)-tartrate, ensuring the correct configuration at each stereocenter. The (S) configuration at the 2-butyl group and (R,R) configuration at the tartrate moiety should be clearly depicted.
Compare the mirror images of (R)-2-butyl (R,R)-tartrate and (S)-2-butyl (R,R)-tartrate. Determine if they are superimposable or not. If they are not superimposable, they are not enantiomers.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
8mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Enantiomers
Enantiomers are a pair of molecules that are non-superimposable mirror images of each other. They typically have chiral centers, which are carbon atoms bonded to four different substituents. Understanding enantiomers is crucial for distinguishing between compounds that may have similar physical properties but differ in their biological activity and reactivity.
Recommended video:
Guided course
03:23
How to solve for the percentage of each enantiomer.
Chirality
Chirality refers to the geometric property of a molecule that makes it non-superimposable on its mirror image. A chiral molecule usually contains at least one chiral center, often a carbon atom with four different substituents. Recognizing chirality is essential for determining whether two compounds are enantiomers or not.
Recommended video:
Guided course
05:10What is chirality?
Stereochemistry
Stereochemistry is the study of the spatial arrangement of atoms in molecules and how this arrangement affects their chemical behavior. It encompasses concepts like chirality and the configuration of stereocenters, which are vital for understanding the relationships between different stereoisomers, including enantiomers and diastereomers.
Recommended video:
1:38Polymer Stereochemistry Concept 1
Related Practice
Textbook Question
Draw a three-dimensional structure for each compound, and star all asymmetric carbon atoms. Draw the mirror image for each structure, and state whether you have drawn a pair of enantiomers or just the same molecule twice.Build molecular models of any of these examples that seem difficult to youe. Chlorocyclohexanef. Cis-1,2-dichlorocyclobutane
Textbook Question
Draw a three-dimensional structure for each compound, and star all asymmetric carbon atoms. Draw the mirror for each structure, and state whether you have drawn a pair of enantiomers or just the same molecule twice. Build molecular models of any of these examples that seem difficult to you.
(i)
6
views
Textbook Question
Draw a Fischer projection for each compound. Remember that the cross represents an asymmetric carbon atom, and the carbon chain should be along the vertical, with the IUPAC numbering from top to bottom.c. (S)-1,2-dibromobutaned. (R)-butan-2-ol
7
views
Textbook Question
For each compound, determine whether the molecule has an internal mirror plane of symmetry. If it does, draw the mirror plane on a three-dimensional drawing of the molecule. If the molecule does not have an internal mirror plane, determine whether the structure is chiral.a. Methaneb. cis-1,2-dibromocyclobutanec. trans-1,2-dibromocyclobutane
1
views
Textbook Question
For each of the stereocenters (circled) in Figure 5-5,
a. draw the compound with two of the groups on the stereocenter interchanged.
b. give the relationship of the new compound to the original compound.
2
views