4. Answer the following question for the molecule shown: (a)How many chirality centers does it have? Identify them. (b)How many stereoisomers of are there? (c)Draw the structure of the enantiomers. (d)Draw the structure of a diastereomers. сно но он

4. Answer the following question for the molecule shown: (a)How many chirality centers does it have? Identify them. (b)How many stereoisomers of are there? (c)Draw the structure of the enantiomers. (d)Draw the structure of a diastereomers. сно но он

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter12: Chirality

Section: Chapter Questions

Problem 6E

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4. (a) Draw all possible isomers of C4H3CI2. (b) Indicate which pairs of compounds are enantiomers of one another. (c) Indicate which pairs of compounds are diastereomers of one another. (d) Indicate which compounds would have optical rotations of 0°. (e) Assign R and S configurations to all chirality centers of the compounds in part (a).
1. Consider the following pairs of structures. Designate each chirality center as (R) or (5) and identify the relationship between them by describing them as representing enantiomers, diastereomers, constitutional isomers, or two molecules of the same compound. Use handheld molecular models to check your answers. HG (a) Br and and CH H,G H (b) and CH, Br Br 'F (k) and Br CI Br (e) and CH, CH, CH CH, CH, H- -H- CH and H- -Br (d) and FCH CH, CH, Br H CH, and (m) (e) and H. Br CH, and (m) and Br CH (o) and nd and and and
a) How many chiral centers exist in the following molecule structure A? b) How many possible stereoisomers would exist for structure A (including structure A) based on the correct number of chiral centers
17. 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…
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.
5. Two stereoismers with two chiral stereogenic centers that are not mirror images are:
Find and determine the R or S configura- tion for all chiral carbons in Geldanamycin, an antibiotic. You must be clear on which carbon atoms you are assigning the con- figurations to; draw arrows to the chiral carbon if you have to. Hint: There are six chiral carbons in this molecule. Calculate the total number of stereoisomers for Gel- danamycin. The formula for doing so is 2", where n is the number of stereocenters. CH 30. H3C CH3O OH NH CH3 CH 30 CH3 NH₂
Shown are three molecules A, B and C; only one of the molecules is chiral. Identify the chiral molecule (putting a circle around it suffices) and assign its absolute chirality. Draw the opposite enantiomer of the molecule that you have identified as chiral. A B
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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 ОН
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3. 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 build a table to give the relationship between each stereoisomer. may SH