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- Classify each of the following molecules as a(n) aromatic, nonaromatic, or antiaromatic compound:A. The Cycloheptatrienyl cation is very unstable although it has seven resonance structures, however cyclopentadienyl cation is stable ever it has less resonance structure. B. Why are the following conversions poor synthetic methods to prepare the desired products? + OH2* Does not give H20Determine if each structure is aromatic, nonaromatic, or antiaromatic and which lone pairs are participating in aromaticity.