Which one of the following is a correct statement about the two alkenes: CH3 - CH2 - CH = CH2 and CH3 - CH = CH3?
Correct answer: D. Neither exhibits cis-trans isomerism
- A. Neither may be polymerized
- B. Neither reacts with bromine to give 1,4-Dibromobutane
- C. Neither reacts with hydrogen to form butane
- D. Neither exhibits cis-trans isomerism
Explanation
Cis-trans isomerism, also known as geometric isomerism, occurs in alkenes when there is restricted rotation around the carbon-carbon double bond. However, in the given alkenes, there are no substituents attached to the double bond carbon atoms, and both alkenes have the same groups on each side of the double bond. Therefore, there is no cis or trans configuration possible, and neither of these alkenes exhibits cis-trans isomerism.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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