Aromatics Flashcards
Why is benzene more stable than cyclcohex-1,3,5-triene?
Has a higher enthalpy of hydrogenation which means it requires more energy to break the bonds
Why does Benzene having its electron in the p orbital make it more stable?
As it forms a ring of delocalised electrons
What is unusual about the bonds in benzene?
They are all the same length
What type of reaction does benzene undergo?
Electrophillic substitution
What must be drawn when doing a benzene mechanism?
The circle becoming a half circle with a +
An arrow from the hydrogen bond going back into the half circle
What are the conditions for the formation of nitrobenzene?
Heated at 55°C
When forming nitrobenzene where does the NO2+ come from?
H2SO4 + HNO3 -> H2NO3+ + HSO4-
H2NO3+ -> H2O + NO2+
What are the products in the formation of nitrobenzene?
Nitrobenzene
H+
What is benzene in terms of acid-base?
Lewis base
What is the reaction of Benzene and an acyl chloride called?
Friedel-Crafts acylation
What reacts with the acyl chloride to form electrophile?
AlCl3
What type of bonding does AlCl3 have?
A dative covalent bond (with one of the chlorines) as it want a full outer shell
What is nitrobenzene reduced to?
Phenylamine
