Chemistry - GOC Question with Solution | TestHub

(a) pyridine : aromatic. (b) thiophene : aromatic (6π). (c) buta-1,3-diene : acyclic, non-aromatic. (d) the tropylium cation has 6 π electrons : aromatic. (e) cyclopentene : non-aromatic. (f) cyclopentadiene has an $\mathrm{s}{\mathrm{p}}^3$ carbon : non-aromatic. (g) anthracene : aromatic. (h) the cyclopentadienyl anion has 6 π electrons : aromatic. The count is 5.