Benzene 🤡

Question 1

What is the name of the fist Aromatic model?

Answer 1

Kekle model

Question 2

Why was kekle model disapproved?

Answer 2

-Hydrogenation was less exothermic than expected
-Bond lengths were intermediate and wasn’t symmetrical
-Benzene is resistant to electrophilic attack

Question 3

What angle is benzene?

Answer 3

120*

Question 4

What mechanism does benzene undergo?

Answer 4

Electrophilic subsititution

Question 5

Why does benzene undergo substitution?

Answer 5

Because it may disturb its nature

Question 6

What is the name when a OH- ion group is directly bonded to a benzene group?

Answer 6

Phenol

Question 7

Describe the bonding in benzene.

Answer 7

-P orbitals overlap to form Pi bonds
-Pi electrons are delocalised

Question 8

Why was there an update in kekule model?

Answer 8

-Carbon-carbon bond lengths are the same in benzene
-Enthalpy change of hydrogenation is less exothermic

Question 9

What is the definition of concordant results?

Answer 9

-Set of measurements that are very close together typically with0.1cm^3

Question 10

write the equation of the formation to make the ion for electrophilic substitution with a bromine ion and the regeneration of the ion.

Answer 10

-Br2 + FeBr3 -> Br+ + feBr4-
-H+ FeBr4- -> FeBr3 + HBr