benzene

Question 1

what did kekules equilibrium model of benzene show

Answer 1

that there were alternating double and single bonds in the hexagon structure of benzene

Question 2

what were the problems with kekules equilibrium structure

Answer 2

-each functional groups bond length is different
-real benzene is more stable (lower enthalpy) than kekules benzene
-doesn’t go through an addition reaction

Question 3

properties of benzene

Answer 3

-cyclic
-planar molecule
-C6H6
-4 valence e-
-delocalised electrons system

Question 4

why is benzene resistant to bromination compared to alkenes

Answer 4

-in benzene electrons are delocalised
-in alkenes electrons are localised between two carbones
-benzene has a lower electron density compared to alkene having high electron density
-benzene polarises bromine less and induces a weaker dipole in bromine