Concept explainers
Interpretation:
Whether the two structures in each of the given pairs represent constitutional isomers, different conformations of the same compound, or stereoisomers that cannot be interconverted by rotation about single bonds is to be determined.
Concept introduction:
Different compounds having same molecular formula are called isomers. They can either differ in connectivity or differ in the arrangement of atoms in space.
Different spatial arrangements of a molecule are made by rotation about single bonds. These structures are called as conformations, that is., structures can be made identical by rotation around one or more single bonds.
Stereoisomers have the same constitution but they have different special arrangement of atoms.
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ORGANIC CHEMISTRY,VOL.1 >CUSTOM<
- Tell whether the following pairs of compounds are identical, constitutional isomers, stereoisomers, or unrelated. (a) cis-1, 3-Dibromocyclohexane and trans-1, 4-dibromocyclohexane (b) 2, 3-Dimethylhexane and 2, 3, 3-trimethy1pentanearrow_forwardFor each of the following pairs of structures, determine whether they are 1. Different conformations of the same molecule 2. Different compounds that are constitutional isomers 3. Different compounds that are not constitutional isomers a. b. c. d.arrow_forwardIndicate whether the members of each of the following pairs of hydrocarbons are (1) constitutional isomers, (2) stereoisomers, or (3) not isomers. a. 2-Methylpentane and cyclopentane b. 2-Methylpentane and 2-ethylpentane c. Ethylcyclohexane and 1,2-dimethylcyclohexane d. cis-l,3-Diethylcyclobutane and trans-1,3-diethylcyclobutanearrow_forward
- Determine whether the following pairs of structures in each set represent the same molecule or constitutional isomers, and if they are the same molecule, determine whether they are in the same or different conformations: (a) (b) (c) (d)arrow_forwardcis-1,2-Dimethylcyclohexane and trans-1-ethyl-2-methylcyclopentane are __________. the same compound constitutional isomers geometric isomers diastereomers enantiomersarrow_forwardClassify each pair of compounds as constitutional (structural) isomers or stereo isomers.arrow_forward
- Draw Newman projections of the two conformers of trans-1,3-dimethylcyclohexane.arrow_forwardWithout drawing out the structures, label following pair of compounds as enantiomers or diastereomers. (2R,3S,4R)-hexane-2,3,4-triol and (2S,3R,4R)-hexane-2,3,4-triolarrow_forwardIndicate 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.arrow_forward
- For each of the following molecular formulas, determine the number of elements of unsaturation,and draw three examples.(a) C4H4Cl2 (b) C4H8O (c) C6H8O2 (d) C5H5NO2 (e) C6H3NClBrarrow_forwardDraw Newman projections of the two conformers of trans-1,3-dimethylcyclohexane. Which of the conformers predominates at equilibrium?arrow_forwardList whether a through g are conformers, constitutional isomers, or stereoisomers.arrow_forward
- Organic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning