Aromatic Chemistry Flashcards
1
Q
What is Benzene’s structure + formula?
A
C6H6
2
Q
Structure of Bromobenzene?
A
3
Q
Structure of Phenol?
A
4
Q
Why is benzene not cyclohexane-1,3,5-tiene? (3)
A
- Reactivity with Br2 —-> Cyclo… orange to colourless, Benzene reacts as substitution not addition
- Bond length
- Hydrogenation enthalpy
5
Q
Structure of Benzene? (7)
A
BONDING
- Each C has 3 covalent bonds
- Spare electrons in P orbital overlap
- Which cause ring of delocalised e- to form
SHAPE
- Planar —> 120 bonds
- C—C bonds are equal in length
STABILITY
- Expected △H hydrogen of cyclohexane = -360 Jmol-1 whereas Benzene is less
- Benzene is more stable
6
Q
Nitration of Benzene
- Reagent
- Mechanism
- Catalyst
A
- Conc. HNO3
- Electrophilic Substitution
- Conc. H2SO4
7
Q
Nitration of Benzene mechanism?
A
8
Q
Overall reaction for the formation of the electrophile for nitration of Benzene?
A
9
Q
Acylation of Benzene
- Reagent
- Mechanism
- Catalyst
A
- RCOCl <—– Acyl Chloride
CH3COCl <—— Ethanoyl Chloride - Electrophilic Substitution
- AlCl3
