Concept explainers
(a)
Interpretation:
The given compound has to be identified as cis or trans isomer.
Concept introduction:
Conformers: The different spatial arrangements of the atoms the result from rotation about a single bond is called conformational isomers.
Stereoisomerism (or) geometric isomerism: It is known as cis-trans isomerism or E-Z isomerism is a form of stereoisomerism the each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in (cis) and (trans) configurations know as geometric isomerism.
Relative stability of cyclohexane: The most stable conformation of cyclohexane is the chair shown to the right, the respective carbon (-C-C-) bonds are it close to
(b)
Interpretation:
The given compound has to be identified as cis or trans isomer.
Concept introduction:
Conformers: The different spatial arrangements of the atoms the result from rotation about a single bond is called conformational isomers.
Stereoisomerism (or) geometric isomerism: It is known as cis-trans isomerism or E-Z isomerism is a form of stereoisomerism the each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in (cis) and (trans) configurations know as geometric isomerism.
Relative stability of cyclohexane: The most stable conformation of cyclohexane is the chair shown to the right, the respective carbon (-C-C-) bonds are it close to
(c)
Interpretation:
The given compound has to be identified as cis or trans isomer.
Concept introduction:
Conformers: The different spatial arrangements of the atoms the result from rotation about a single bond is called conformational isomers.
Stereoisomerism (or) geometric isomerism: It is known as cis-trans isomerism or E-Z isomerism is a form of stereoisomerism the each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in (cis) and (trans) configurations know as geometric isomerism.
Relative stability of cyclohexane: The most stable conformation of cyclohexane is the chair shown to the right, the respective carbon (-C-C-) bonds are it close to
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Essential Organic Chemistry, Global Edition
- Isomers are compounds having different structures but same molecular formula O different rings different molecular formula same structures but different molecular formulaarrow_forwardFor which isomer would you expect a greater equilibrium percentage of molecules with the alkyl group in the axial position, isopropylcyclohexane or propylcyclohexane? Explain. Isopropylcyclohexane Propylcyclohexanearrow_forwardFor the compounds below, which, if any, exist as cis- or trans-isomers? Type the number or numbers of the compound(s) (separated by a comma with no spaces). If none of the compounds exist as cis- or trans-isomers, type none. H₂C: 3 CH3 CH3 CH3 CH3 H₂C Cl 2 4 -CH3 CH3arrow_forward
- Is there a difference in the stability of the two cyclohexane conformations?arrow_forwardWhich of the following conformers has the highest energy (the least stable)?Justify your choicearrow_forwardWhich of the following is a reasonable definition of a concerted reaction? O it is a substitution reaction O it is a reaction in which bond breaking occurs first O it is a reaction in which bond forming occurs first O it is a reaction in which all bond breaking and bond forming occurs at the same timearrow_forward
- Do you predict the product to be the cis isomer, the trans isomer, or a mixture of cis and trans isomers? Explain.arrow_forwardConsider the following tetra-substituted cyclohexanearrow_forwardSelect the choice that best describes the relationship of the pair of compounds. H3C H. H3C CH3 H3C The compounds are: O geometric or cis/trans isomers CH3 H3C H. O constitutional isomers O not isomeric O the same compoundarrow_forward
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- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT