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(a)
Interpretation:
For the given molecule, whether cis‑trans isomerism is possible has to be indicated.
Concept Introduction:
A cis isomer is the one in which the same groups are present on same side of both the carbon atoms present in the double bond.
A trans isomer is the one in which the same groups are present on opposite side of both the carbon atoms present in the double bond.
Cis‑trans isomerism is not possible if any one of the carbon atom bonded to the double bond bears two identical groups.
Cis‑trans isomers are not constitutional isomers but they are stereoisomers.
(b)
Interpretation:
For the given molecule, whether cis‑trans isomerism is possible has to be indicated.
Concept Introduction:
Alkenes are hydrocarbons that contain at least one double bond in it. There will not be any free rotation of the double bond in alkene. Hence, cis‑trans isomerism is possible. The first and foremost condition for the alkene to exhibit cis‑trans isomerism is that the carbon attached in either end of double bond must have different groups attached to it.
A cis isomer is the one in which the same groups are present on same side of both the carbon atoms present in the double bond.
A trans isomer is the one in which the same groups are present on opposite side of both the carbon atoms present in the double bond.
Cis‑trans isomerism is not possible if any one of the carbon atom bonded to the double bond bears two identical groups.
Cis‑trans isomers are not constitutional isomers but they are stereoisomers.
(c)
Interpretation:
For the given molecule, whether cis‑trans isomerism is possible has to be indicated.
Concept Introduction:
Alkenes are hydrocarbons that contain at least one double bond in it. There will not be any free rotation of the double bond in alkene. Hence, cis‑trans isomerism is possible. The first and foremost condition for the alkene to exhibit cis‑trans isomerism is that the carbon attached in either end of double bond must have different groups attached to it.
A cis isomer is the one in which the same groups are present on same side of both the carbon atoms present in the double bond.
A trans isomer is the one in which the same groups are present on opposite side of both the carbon atoms present in the double bond.
Cis‑trans isomerism is not possible if any one of the carbon atom bonded to the double bond bears two identical groups.
Cis‑trans isomers are not constitutional isomers but they are stereoisomers.
(d)
Interpretation:
For the given molecule, whether cis‑trans isomerism is possible has to be indicated.
Concept Introduction:
Alkenes are hydrocarbons that contain at least one double bond in it. There will not be any free rotation of the double bond in alkene. Hence, cis‑trans isomerism is possible. The first and foremost condition for the alkene to exhibit cis‑trans isomerism is that the carbon attached in either end of double bond must have different groups attached to it.
A cis isomer is the one in which the same groups are present on same side of both the carbon atoms present in the double bond.
A trans isomer is the one in which the same groups are present on opposite side of both the carbon atoms present in the double bond.
Cis‑trans isomerism is not possible if any one of the carbon atom bonded to the double bond bears two identical groups.
Cis‑trans isomers are not constitutional isomers but they are stereoisomers.
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Chapter 13 Solutions
Bundle: General, Organic, and Biological Chemistry, 7th + OWLv2 Quick Prep for General Chemistry, 4 terms (24 months) Printed Access Card
- Which of the following compounds show geometrical isomerism? a. 1-Clorobut-1-ene b. 1,2-Dichlorobut-1-ene c. 1,1-Dichlorobut-1-ene d. 1-Clorobut-2-ene e. 1,3-Dimethylcyclohexane b,d,e c a,c,d a,e a,b,d,earrow_forwardwhich of the following is an isomer of 2- methylpropane? W. 1-propene X. n-propane Y. 1-propyne Z. n-butanearrow_forwardWrite skeletal formulas for the following alkanes and cycloalkanes. Use solid and broken lines to indicate stereochemistry. a.3-ethyl-2,4,5-trimethyloctane b.4-(1-methylethyl)octane c.5-butyl-2,2-dimethylnonane d.trans-1,3-dimethylcyclopentane e.cis-1,2-diethylcyclobutanearrow_forward
- 13. Ethylethanoate and butanoic acid can be classified as A. positional isomers B. chain isomers C. functional isomers D. stereoisomers 14. Which of the following pairs are positional isomers A. trans-1,4-dichlorocyclohexane, cis-1,3-dichlorocyclopentane B. trans 1,4-dichlorocyclohexane, cis-1,4-dichlorocyclohexane C. 2-pentanol, Cyclopentanol D. 1,2-cycohexanediol, 1,3-cycohexanediol 15. Which of the following compounds will have zero dipole moment? A. cis-1,2-dibromoethylene B. 1,1-dibromoethylene C. trans-1,2-dibromoethylene D. all of these 16. Which of the following is not aromatic: A. cyclopentadienyl cation B. cyclopentadienyl anion C. Cyclopropenyl cation D. Cycloheptatrienyl cation 17. Which of the following compounds containing lone pair has the least tendency to donate its electrons? A. the lone pair in pyridine B. the lone pair in furan C. the lone pair in pyrole D. the lone pair in thiophenearrow_forwardA student was given the structural formulas of several compounds and was asked to give them systematic names. How many did she name correctly? Correct those that are misnamed. a. 4-ethyl-2-pentyne b. 2-methyl-3-hexyne c. 4-chloro-2-pentyne d. 2,3-dimethyl-5-octyne e. 4-heptynearrow_forwardWhich of the following compounds is not an isomer of undecane? a. 2-methyldecane d. 3,4-diethylheptane e. 2,2,3,3,4,4-hexamethylpentane b. 3,3-dimethylnonane c. 3-ethyloctanearrow_forward
- 7. In which of the following pairs of alkanes are the two compounds isomers? A. hexane and 3-methylhexane B.2,4-dimethylhexane and 2,4-dimethylheptane C. 3-methylnonane and 3,4-dimethyloctane D. ethane and propanearrow_forwardWhich of the following can exist as cis-trans isomers? a. cyclohexane b. methylcyclohexane c. 1,1-dimethylcyclohexane d. 1,2-dimethylcyclohexanearrow_forwardDraw the condensed formula of each of the following compounds:a. 1-Bromo-2-chlorohexane c. 1,3,5-Trichloroheptane e. 1,2-Dibromo-3-chlorobutaneb. 2,3-Dimethylpentane d. 3-Chloro-5-iodo-4-methyloctane f. Trifluorochloromethanearrow_forward
- Draw structures for the following molecules.a. 2-chlorobutane c. 1,1,1-trichloroethaneb. 1,3-difluorohexane d. 4-bromo-1-chlorobenzenearrow_forwardOn a clean sheet of paper, draw acceptable chemical structures for the following compounds. Please label your structures on your scrap paper with the names. a. 2,3,4-trimethyloctane b. 2,3-dimethyl-4-propylnonane c. cyclobutylcyclohexane d. 3-ethyldecanearrow_forwardA student was given the structural formulas of several compounds and was asked to give them systematic names. How many did she name correctly? Correct those that are misnamed. a. 4-ethyl-2-pentyne b. 1-bromo-4-heptyne c. 2-methyl-3-hexyne d. 3-pentynearrow_forward
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