Chapter 15.10, Problem 19P

Draw out the orbital structure and indicate if aromatic, antiaromatic, or non-aromatic furan thiophene

2- Apply the polygon-and-circle method to the cyclopentadienyl cation and explain whether it would be aromatic or not. Cyclopentadienyl cation

Prove the aromaticity of the following molecules by discussing | d)

Explain how to construct the molecular orbitals of a conjugated cyclic system similar tobenzene and cyclobutadiene. Use the polygon rule to draw the energy diagram, and fillin the electrons to show whether a given compound or ion is aromatic or antiaromatic.

2. State the two main experiments that were used to establish the extra stability of the benzene molecule. 3. What are the factors that confer Aromaticity to an organic molecule? 4. i. State the effects of substituents on a benzene derivative towards further aromatic substitution.

why is cyclopentadiene more acidic than cycloheptatriene?

3)  In the mid-1930s, the German theoretical chemist Erich Hückel developed a rule that dealt with the aromaticity of various compounds, which became known as the Hückel Rule. Which (parts) of the compounds listed below are aromatic? Justify your answer based on Hückel's rule. You can treat the rings separately or together as you wish.

Use the inscribed polygon method to show the pattern of molecularorbitals in cyclooctatetraene. Classify the dianion of cyclooctatetraene as aromatic, antiaromatic, ornot aromatic, and explain why this is so.

Explain why the Diels Alder reaction would have synthetic significance in the production of biologically active compounds.