18 Questions
Why does benzene not undergo electrophilic addition reactions?
It involves breaking up the stable delocalized ring of electrons.
Which type of reaction does benzene primarily undergo instead of electrophilic addition?
Electrophilic substitution
What role does iron(III) bromide play in halogenation reactions involving benzene?
It generates the electrophile necessary for the reaction.
How can aromatic amines be produced from benzene?
By undergoing electrophilic substitution reactions
What type of ion acts as the electrophile in a nitration reaction involving benzene?
NO2+
Why is benzene described as an area of high electron density in electrophilic substitution reactions?
Due to the presence of a stable delocalized ring of electrons.
Which type of reaction involves a molecule being broken down by its reaction with water?
Hydrolysis
What happens to a species during oxidation?
Loses at least one electron
What type of reaction produces a small molecule like water while forming a larger molecule?
Condensation
What makes benzene very stable compared to other molecules of similar size?
Delocalised ring electrons
What was previously thought to be the structure of benzene before its actual structure was discovered?
Three double bonds and three single bonds
Which type of compounds contain benzene rings as part of their structure?
Arenes
Why was the enthalpy change of hydrogenation of benzene lower than expected?
Benzene is more stable than the suggested cyclohexatriene structure predicted.
What does X-ray diffraction data reveal about benzene's bond lengths?
All bond lengths are the same, unlike cyclohexatriene's varied lengths.
How does benzene's resistance to electrophilic addition reactions differ from alkenes?
Alkenes undergo electrophilic addition reactions while benzene is resistant to them.
What did the infrared data collected from benzene molecules reveal?
The cyclohexatriene structure did not explain the infrared data.
Why did the enthalpy change of hydrogenation for benzene initially predict a value of -360 kJ mol-1?
Benzene was thought to have a structure different from cyclohexatriene.
How does benzene's stability compare to that predicted by the cyclohexatriene structure?
Benzene is more stable than what the cyclohexatriene structure suggests.
Test your knowledge on different chemical reactions such as oxidation, reduction, hydrolysis, condensation, and elimination. Learn about aromatic compounds like Arenes that contain a benzene ring.
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