Task

a) Draw a Kekule diagram for benzene.  Why is this representation of benzene not considered to be as good as drawing a hexagon with a circle in the centre?  What does the circle represent?

b) Draw a diagram of benzene, label the bond types (e.g sp³, sp²etc) and include the bond lengths.  Briefly explain how these types of bonds are formed.

c) Draw a diagram/s to show the six molecular orbitals of benzene and label them as bonding or anti bonding.

Task 2

Produce a handout, poster, PowerPoint or other appropriate resource to explain how the enthalpy of hydrogenation, bond lengths and resistance to electrophonic addition reactions supports the modern theory of the structure of benzene.  Remember the scenario of training laboratory technicians.

Task 3

a) What is Huckels rule and how can it used to determine if a compound is aromatic or antiaromatic?

b) Produce an aromaticity worksheet, for your technicians. 

• Include at least 5 compounds which are aromatic, and include at least one ion one heterocycle.
• Include a minimum of 2 compounds which are aromatic and one which is not aromatic.

c) Provide an answer sheet on which you have included explanations for the answers.