Concept explainers
(a)
Interpretation:
The configuration of each stereocenter in the given molecule is to be designated as R or S and the IUPAC name for each molecule is to be written.
Concept introduction:
When assigning priorities to substituents, the atom having the greater
(b)
Interpretation:
The configuration of each stereocenter in the given molecule is to be designated as R or S and the IUPAC name for each molecule is to be written.
Concept introduction:
When assigning priorities to substituents, the atom having the greater atomic number has higher priority. In case of comparison between isotopes, the one having the greater atomic mass gets the higher priority. When the fourth priority substituent is pointing away (it is attached by a dash bond) and the first, second, and third priority substituents are arranged clockwise, the configuration is R. When the fourth priority substituent is pointing away (it is attached by a dash bond) and the first, second, and third priority substituents are arranged counterclockwise, the configuration is S. If the fourth priority substituent is attached by a wedge bond, then the clockwise or counterclockwise arrangement of the first, second, and third priority substituents is determined and that arrangement is reversed before assigning R or S. If the fourth priority substituent is in the plane of the page, then it is switched with the substituent that points away. Then, the clockwise or counterclockwise arrangement of the first, second, and third priority substituents is determined and that arrangement is reversed before assigning R or S. When writing the IPUAC name, the R or S designation is written in parenthesis for each asymmetric carbon atom and hyphens are used to separate those designations from the rest of the IUPAC name.
(c)
Interpretation:
The configuration of each stereocenter in the given molecule is to be designated as R or S and the IUPAC name for each molecule is to be written.
Concept introduction:
When assigning priorities to substituents, the atom having the greater atomic number has higher priority. In case of comparison between isotopes, the one having the greater atomic mass gets the higher priority. When the fourth priority substituent is pointing away (it is attached by a dash bond) and the first, second, and third priority substituents are arranged clockwise, the configuration is R. When the fourth priority substituent is pointing away (it is attached by a dash bond) and the first, second, and third priority substituents are arranged counterclockwise, the configuration is S. If the fourth priority substituent is attached by a wedge bond, then the clockwise or counterclockwise arrangement of the first, second, and third priority substituents is determined and that arrangement is reversed before assigning R or S. If the fourth priority substituent is in the plane of the page, then it is switched with the substituent that points away. Then, the clockwise or counterclockwise arrangement of the first, second, and third priority substituents is determined, and that arrangement is reversed before assigning R or S. When writing the IPUAC name, the R or S designation is written in parenthesis for each asymmetric carbon atom and hyphens are used to separate those designations from the rest of the IUPAC name.
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ORGANIC CHEMISTRY E-BOOK W/SMARTWORK5
- Draw only the diastereomer(s) of the following moleculearrow_forwardDetermine whether each of the following molecules has a plan of symmetry and draw it inarrow_forwardDraw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the red arrow. Your projection should be oriented as shown by the arrow marked up. So the CH2SH group on the front carbon should be above the H and H3C groups, no matter which template you usearrow_forward
- Which of the conformations has a lower energy?arrow_forwardDraw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the arrow.arrow_forwardDraw both chair conformers for the following molecule and circle the most stable conformation.arrow_forward
- Which one of the following pairs of molecules (a through d) is a pair of two molecules which are mirror image of each other (enantiomers)? *Wedged bonds are pointed toward the observer, and dashed bonds are pointed away from the observer.arrow_forwardDraw the lowest energy conformation for each of the following compoundsarrow_forwardDraw both chair conformations for both of the following cyclohexane derivatives and determine which chair conformer is lower energy and why.arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning