ZCHM11 Lecture 1: SEM- I - Aromaticity and Organic Reaction Mechanism - Unit - I - (Aromaticity and Novel Ring System)

Complete the Frost circle (i.e., use the inscribed polygon method) for [6]-annulene by clicking on the blue boxes to add electrons. Also, classify the aromaticity of the compound. Aromatic Nonaromatic Antiaromatic

Label the following compounds as aromatic, antiaromatic or non aromatic. a) b) c) [16]Annulene d) e) f)

8. The two compounds below were targeted for synthesis to further test the concept of aromaticity. What do you expect them to be? (hint: first decide how many lone pairs 2 has on each atom) -B 0 A. both aromatic B. both non-aromatic C. both antiaromatic D. 1 is aromatic, 2 antiaromatic E. 1 is antiaromatic, 2 aromatic