1. AZT was the first drug approved to treat HIV, the virus that causes AIDS. Explain why the six-membered ring of AZT is aromatic. Use molecular orbital theory as a basis. 2. Which labeled hydrogen is more acidic? (Hint: draw conjugate bases and explain the stabilityin terms of molecular orbital theory) 3. Hydroxychloroquine was in news as a potential treatment for coronavirus infection. (a)Explain why the ring system in Hydroxychloroquine is aromatic. (b) Determine the hybridization of each N atom. (c) In what type of orbital does the lone pair on each N atom reside?

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6