Concept explainers
(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.
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
Organic And Biological Chemistry
- The compound CH2=CHCH2CH2CH3 is an example of: a. a pentane. b. a hexene. c. an alkene. d. organic macromolecule.arrow_forwardWhy are different conformations of an alkane not considered structural isomers?arrow_forwardIs the general formula of a cycloalkanes the same as the general formula of an alkane, CnH2n+2? Draw any structural diagram to illustrate your answer.arrow_forward
- What are structural isomers? What is thesmallest alkane that has a structural isomer?Draw structures to illustrate the isomers.arrow_forwardDraw the structural formula for each of the following. a.3-isobutylhexane b.2,2,4-trimethylpentane, also called isoocta11e. This substance is the reference (100 level) for octane ratings. c. 2-tert-butylpentane d.The names given in parts a and c are incorrect.Give the correct names for these hydrocarbonsarrow_forwardWhich of the following statement is true about alkanes? a Alkanes are one of the three unsaturated hydrocarbons. b Alkanes are always linear molecules. c Alkanes are commonly derived from petroleum and natural gas. d Alkanes have 4 additional hydrogens compared to an alkene with the same number of carbon.arrow_forward
- Hexane and cyclohexane are examples of two molecules that are. A . Constitutional Isomers B. cis - trans isomers C. identical D. enanitiomers E . Unrelated with different formulasarrow_forwardWhy are alkanes used more as fuels than alkenesarrow_forwardDraw and name all of the structural isomers of a) pentane and b) hexane.arrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning