🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenska한국어中文日本語EntityQ1185022· pop 17· linked from 35 articlestropylium cationcircular ionConnectionsheptagonEntityatomEntityCategoriesCarbocationsChembox image size setCycloheptatrienyl complexesNon-benzenoid aromatic carbocyclesSimple aromatic rings