(a)
Interpretation:
The number of asymmetric centers present in the given structure of cholesterol has to be determined.
Concept introduction:
Stereoisomers are isomers which have different spatial arrangement in spite of same bond connectivity. Stereoisomers are due to the presence of stereocenter. Stereocenter may be an atom axis (bond) or plane from which interchanging of two groups leads to stereoisomers.
Asymmetric center is a stereocenter which arises in hydrocarbons if the carbon is bonded to four different groups.
(b)
Interpretation:
The number of possible stereoisomers of cholesterol present in nature has to be determined.
Concept introduction:
Stereoisomers are isomers which have different spatial arrangement in spite of same bond connectivity. Stereoisomers are due to the presence of stereocenter. Asymmetric centers are Stereocenter.
The equation for finding Stereoisomers from number of asymmetric centers in compounds is
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Essential Organic Chemistry, Global Edition
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- 1. An object is chiral if it Ā Ā Ā A. is superimposable on its mirror image Ā Ā Ā B. is not superimposable on its mirror image Ā Ā Ā C. has no mirror image Ā Ā Ā D. is identical to each mirror image of itselfarrow_forwardShown below is Streptomycin, and Neomycin B. Circle and label as many functional groups in these molecules as you can. a. Label each chiral carbon in Streptomycin. How many total stereoisomers exist for Streptomycin? b. Label each chiral carbon in Neomycin B. How many total stereoisomers exist for Neomycin B?arrow_forwardTwo nonsuperposable molecules are shown in the windows below: ball & stick + labels stereoisomer(s) e. Are the two molecules enantiomers? yes ball & stick a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? no [References] stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? + labels Previous Next> Save and Earrow_forward
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