Chapter 5 - Aromatics

Question 1

What is the hybridisation of the 6 carbons on benzene

Answer 1

Sp2 hybridised

Question 2

Define the o, m and p position

Answer 2

o = 2nd position
m = 3rd position
p = 4th position

Question 3

Define the 4 rules for Huckels Aromatics

Answer 3

1. cyclic molecule
2. Planar molecule
3. fully conjugated
4. has 4n + 2pi electrons

Question 4

What are the activating and deactivating groups?

Answer 4

The activating group is a substituted benzene that reacts faster than the original. It donates electrons to the ring. Often things like OH, NH2 and OR
The deactivating group reacts slower than the original, can withdrawl electrons from the ring

Question 5

Delocalised electrons of benzene must…

Answer 5

Delocalised electrons must be an even number but not a multiple of 4

Question 6

What is the result of the oxidation of an alkyl group on benzene?

Answer 6

The oxidation of an alkyl group on benzene reacts rapidly and is converted in carboxyl

Question 7

How many pi electrons are in benzene

Answer 7

Each benzene ring has 6pi electrons, each C=C double bond has an electron pair