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- Which of the following must be true for an optically active compound? the molecular configuration is achiral O b. the molecular configuration is chiral O c. the molecular configuration must have two or more stereogenic centers d. the compound is a racemic mixture of enantiomersWhat is the chiral center in each compound. R or SProvide stereochemical information (R or S for each chiral center)
- (a) assign R or S configuration to each chiral center, (b) Which compound are enantiomers? (c) Which compounds are diastereomers?Shown below is Streptomycin, an antibiotic medication used to treat a number of bacterial infections, including tuberculosis, plague, and endocarditis. Neomycin B has broad-spectrum antibacterial activity. Circle and label as many functional groups in these molecules as you can. Label each chiral carbon in Streptomycin. How many total stereoisomers exist for Streptomycin? Label each chiral carbon in Neomycin B. How many total stereoisomers exist for Neomycin B?Classify each pair of compounds as either identical, constitutional isomers, stereoisomers, or not isomers.
- 8. Assign each chiral carbon as R or S in compound-A. Draw the mirror image of compound-A and assign configuration to each chiral carbon. (note that the dotted line represents the mirror). H₂N S OH Compound A CH3 CH3 mirror CH3 CH 3 Mmok NHZ1. Draw all of the stereoisomers of 2,4-dichloropentane. Indicate the relationship between these stereoisomers, such as enantiomers, diastereomers, or meso compounds.6) Assign R or S stereochemistry to the chiral centers in the molecule to the right. Ol OH •▪▪▪|||||
- Indicate whether the pair of structures shown represent stereoisomers, constitutional isomers, different conformations of the same compound, or the same conformation of a compound viewed from a different perspective. Note that cis, trans isomers are an example of stereoisomers. Но. CI Но- CH3 H3C- H3C- ОН OH17. How many chiral carbon atoms does 1,3-dichloropentane have? a) Zero b) One c) Two d) Three be dextrorotatory. b) An optically active substance that rotates light counterclockwise is said to be levorotatory. c) An optically active substance that rotates light clockwise is said to be levorotatory. d) None of the above statements are correct. 18. How many chiral carbon atoms does chlorocyclohexane have? a) Zero b) One c) Two d) More than two 23. When four different atoms or 19. Stereoisomers that contain chiral carbon atoms and are superimposable on the own mirror image are called: a) diastereomers b) meso compounds c) racemic mixtures d) none of the above are correct functional groups are attached to a carbon atom, the carbon atom is called a(n): a) symmetric carbon atom b) asymmetric carbon atom c) quaternary carbon atom d) optically active carbon atom 24. How many chiral carbons are in the compound below? CH3 CH3 20. Stereoisomers that are not mirror images of each other are…Because there is usually slow interconversion between the two isomeric forms at room temperature. Because there is usually rapid interconversion between the two isomeric forms at room temperature. Because chirality only exists with the tetrahedral carbon atoms. Because four bonds a are needed to define a stereogenic center.