Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Paracetamol nwere isi mgbanaka benzene, nke otu hydroxyl na nitrogen atom nke otu amide na-anọchi anya ya na usoro para (1,4). Òtù amide bụ acetamide (ethanamide). Ọ bụ usoro jikọtara nke ọma, dịka otu di na nwunye na oxygen hydroxyl, igwe ojii benzene pi, nitrogen di na nwunye, p orbital na carbonyl carbon, na otu di na nwunye na oxygen carbonyl niile jikọtara. Ọnụnọ nke ìgwè abụọ na-arụ ọrụ na-emekwa ka mgbanaka benzene na-emeghachi omume nke ọma na electrophilic aromatic substitution. Ebe ọ bụ na ndị na-anọchi anya ha bụ ortho, para-directing na para n'ihe gbasara ibe ha, ọnọdụ niile dị na mgbanaka ahụ na-arụ ọrụ ma ọ bụ na-erughị. Njikọ ahụ na-ebelata ihe ndị dị na oxygen na nitrogen, ebe ọ na-eme ka hydroxyl acid site na nkwụsị nke ụgwọ a na-eme na phenoxide anion.  Ajụjụ: Gịnị na-eme ma e jikọtachaa?
na-ebelata basicity nke oxygen na nitrogen