Aromaticity, anti-aromaticity; annulenes, azulenes, tropolones, fulvenes, sydnones. Post author By Miraj Ahmad Ansari Post date December 11, 2020 UPSC Chemistry Delocalised Covalent Bonding Aromaticity, anti-aromaticity; annulenes, azulenes, tropolones, fulvenes, sydnones. Lesson Progress 0% Complete Previous Lesson Back to Lesson Next Lesson ← separation, oxidation states, magnetic and spectral properties; lanthanide contraction → General methods (both kinetic and non-kinetic) of study of mechanism of organic reactions