(a)
Interpretation:
The presence of asymmetric centers in the given compounds has to be checked.
Concept introduction:
Stereoisomers are isomers which have different spatial arrangement in spite of same bond connectivity. Stereoisomers are due to the presence of stereo center.
Asymmetric center is a stereo center which arises to hydrocarbons if the carbon is bonded to four different groups.
(b)
Interpretation:
The chirality of the given compounds has to be checked.
Concept introduction:
Optical activity (chirality) of a molecule is the interaction between molecule and plane-polarized light.
Molecule having asymmetric center shows optical activity except mesocompounds.
If a compound having non-superimposable mirror image, then the compound is chiral.
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Chapter 4 Solutions
EBK ORGANIC CHEMISTRY
- Which of the following statements must be true for two pure chiral somers? O a. they must be enantiomers O b. they must be stereoisomers O c. they must be optically active O d. they must be diastereomersarrow_forwardChair conformations must be considered before determining overall chirality of a molecule. a. FALSE b. TRUEarrow_forward6. It is important to be able to recognize stereocenters in molecules. We have seen chiral centers and alkenes, but there are other types. Answer the following questions about molecules A and B. H H molecule A H B H molecule B a) Are the molecules isomers? b) Are the molecules stereoisomers? c) Are the molecules enantiomers? d) Do the molecules contain any chiral centers? e) Do the molecules contain any stereocenters? Yes Yes Yes Yes Yes No No 22 2 No Noarrow_forward
- In the structure provided choose the option YES or NO to indicate if the carbon atoms are chiral. H₂N A !!! B ...!!!! OH C CIarrow_forwardWhich of the following compounds are chiral? CI .CI I. I. II. O I. only II. only I. and III. II. and III.arrow_forwardUnder what conditions is a carbon atom a chiral center? A. if it has no stereoisomers B. if the molecule that it belongs to can be superimposed on its mirror image after rotation C. if it is symmetric D. if it has four different substituent groupsarrow_forward
- Consider molecules with more than one chiral center. Consider 2,3-dyhdroxybutanoic acid. a. How many chiral centers does it have? b. Which ones? c. Reproduce the structure and encircle the four groups, which are linked to each chiral carbon.arrow_forwardIdentify which of the compound is chiral.a. T-butyl alcoholb. 2,2-dimethylpropanec. 1,2,4,5-tetramethylcyclohexaned. 2-hydroxypropanoic acidarrow_forwardWhich of the following molecule(s) is/are chiral? O O H3C H₂N H₂N Br Zum…... )......… CH3 H C=C=C H CH3 CO₂H CO₂H Br H CH3 CH3arrow_forward
- Label compounds as active or inactive and identify their chiral centersarrow_forwardRefer to the following molecule: CH,CH, Br H. H,C NO2 How many achiral carbons are there? Select ] The molecule is chiral. [ Select] What is the configuration on C2? [Select ] Does the molecule have a meso isomer? [ Select ] How many stereoisomers does the molecule have (including the one already shown)? [ Select ] How many diastereomer pairs does the molecule have? [Select] If the -NO2 and -Br switched places, the new compound will be [Select] with the original compound. What is the third priority substituent on carbon 2? Select]arrow_forwardDetermine the number of chiral center(s) is /are present in the molecule below: 0 0 0 0 a. 3 O b.2 OC.4 d.5 H Type here to search HO СООН OH O II (((arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning