Benzene Flashcards
0
Q
The main characteristics of Benzene
A
Normal sigma bond and pi bond where the p-orbitals overlap but all across the molecule, giving it a ring of delocalised electrons.
1
Q
Problems with kekulé’s model?
A
Benzene has a low reactivity but Kekulé’s model should be high. The bond lengths were wrong, expected to have 3 of 0.134nm and 3 of 0.153nm of length. Actually 0.139 nm length. Enthalpy of hydrogenation is expected to be -360KJmol^-1 but is in fact -208KJmol^-1 meaning it’s more stable than originally thought.
2
Q
Structure of Benzene
A
C6H6
3
Q
Empirical formula of Benzene
A
CH
4
Q
What are its typical reactions?
A
Electrophilic substitution
