Concept explainers
(a)
Interpretation: All the possible stereoisomers of the given compound has to be drawn and among these stereoisomers the pair of enantiomers and diastereomers and meso compound if any has to be labelled.
Concept introduction: Stereoisomers are those compounds which have same molecular formula but different orientation of atoms in space. Enantiomers are the non-superimposable mirror images of each other while diastereomers are not mirror images of each other. Meso compounds are optically inactive compounds which contain two or more than two chiral centres. The total number of stereoisomers for an unsymmetrical molecule
(b)
Interpretation: All the possible stereoisomers of the given compound has to be drawn and among these stereoisomers the pair of enantiomers and diastereomers and meso compound if any has to be labelled.
Concept introduction: Stereoisomers are those compounds which have same molecular formula but different orientation of atoms in space. Enantiomers are the non-superimposable mirror images of each other while diastereomers are not mirror images of each other. Meso compounds are optically inactive compounds which contain two or more than two chiral centres. The total number of stereoisomers for an unsymmetrical molecule
Number of optically active stereoisomers =
Number of meso compounds =
Total number of stereoisomers = Number of optically active stereoisomers + Number of meso compounds
(c)
Interpretation: All the possible stereoisomers of the given compound has to be drawn and among these stereoisomers the pair of enantiomers and diastereomers and meso compound if any has to be labelled.
Concept introduction: Stereoisomers are those compounds which have same molecular formula but different orientation of atoms in space. Enantiomers are the non-superimposable mirror images of each other while diastereomers are not mirror images of each other. Meso compounds are optically inactive compounds which contain two or more than two chiral centres. The total number of stereoisomers for an unsymmetrical molecule
(d)
Interpretation: All the possible stereoisomers of the given compound has to be drawn and among these stereoisomers the pair of enantiomers and diastereomers and meso compound if any has to be labelled.
Concept introduction: Stereoisomers are those compounds which have same molecular formula but different orientation of atoms in space. Enantiomers are the non-superimposable mirror images of each other while diastereomers are not mirror images of each other. Meso compounds are optically inactive compounds which contain two or more than two chiral centres. The total number of stereoisomers
The total number of stereoisomers for symmetrical molecules containing odd number of chiral centers can be calculated as follows:
Total number of stereoisomers =
Number of meso compounds =
Number of optically active stereoisomers =
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Organic Chemistry
- 1. Draw all of the stereoisomers of 2,4-dichloropentane. Indicate the relationship between these stereoisomers, such as enantiomers, diastereomers, or meso compounds.arrow_forward3) Draw all the distinct stereoisomers for the structure below. Identify 2 enantiomeric and 4 diastereomeric relationships among the stereoisomers. Label any Meso-Compound. Br Cl Brarrow_forward1. Draw all possible stereoisomers for the following molecule. Once drawn, assign the configuration at each chiral center as R or S. Give the relationship between each stereoisomer that was drawn as enantiomers, diastereomers, or meso compound. You may build a table to give the relationship between each stereoisomer. ОН NH2arrow_forward
- 5. Which of the following statements is not true? A) A molecule that is superimposable on its mirror image is said to achiral. B) A molecule that is not superimposable on its mirror image is said to be chiral. C) A molecule that is superimposable on its mirror image is said to be chiral. D) A carbon atom bonded to four different groups is a stereogenic center.arrow_forward1. Identify the total number of stereoisomers for the following. Draw them all. Draw each pair of enantiomers next to each other. Label each pair of enantiomers and any meso compounds that exist. You do not need to draw any chairs for this question. ýarrow_forwardDraw all the possible stereoisomers for the attached compound, and label pairs of enantiomers and diastereomers.arrow_forward
- !!!!! Br MULTIPLE CHOICE QUESTION CH₁ CH₁ The above molecules are identical enantiomers diastereomers Brarrow_forwardDraw all possible stereoisomers for HC=OCHClCHClCH2Br. Label the compounds as Compound I, II, etc.. Determine the relation of each of these compounds to another (pair relations as enantiomers, diastereomer, mesocompound or no relations).arrow_forwardLabel each pair as enantiomer, diastereomer or same molecules.arrow_forward
- 2. Draw all possible stereoisomers for the following molecule. Once drawn, assign the configuration at each chiral center as R or S. Give the relationship between each stereoisomer that was drawn as enantiomers, diastereomers, or meso compound. You may build a table to give the relationship between each stereoisomer. OH ОНarrow_forwardConsider the molecule shown. OH CI How many stereoisomers are possible? Draw each of the possible stereoisomers and identify pairs of enantiomers and pairs of diasteriomers.arrow_forwardThe structure of 4 isomers of ketopentose are shown. 1) select every structure that is a diastereomer of structure D A, B, or C? 2) select every structure that is a enantiomer of structure C A, B, or D 3) select every structure that is a stereoisomer of structure C A, B, or Darrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning