What are the three pieces of evidence that disprove the Kekulé model of Benzene?

The enthalpy change of hydrogenation is less exothermic than suggested by the Kekulé model ( -208kJmol-1 instead of the expected -357kJmol-1), meaning Benzene is more thermodynamically stable than the Kekulé model predicts. The Kekulé model also suggests Benzene has 3 shorter C=C bonds and 3 longer C-C bonds. However, in reality, all bonds in Benzene are the same length. Furthermore, the Kekulé model suggests Benzene readily reacts with bromine water. However, the bromination of Benzene does not occur readily and requires a catalyst: the final evidence against the Kekulé model.

Related Chemistry A Level answers

All answers ▸

State and explain whether NaCl and Mg can conduct electricity in both the solid and molten states.


What trends are shown as you go down group 2 of the periodic table?


Name and Outline a mechanism for the formation of methylpropanoate from methanol and propanoyl chloride.


What is the mechanism for the nucleophilic substitution of a halogenoalkane?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences