17-1 State whether the following molecules are aromatic, antiaromatic or nonaromatic.
17-2 Predict which of the following nitrogen-containing heterocycles is more acidic than the other. Provide a reason for your choices.
17-3 For the following bases of DNA, identify the heterocyclic compound that makes up the core structure of each one - purine or pyrimidine?
17-4 Provide the proper IUPAC names for the following compounds.