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来自维基百科,自由的百科全书
但根據IUPAC定義,hydroxy與hydroxyl意義並不同:術語hydroxyl僅指羥自由基(hydroxyl radical,·OH);而官能基-OH才稱作hydroxy group,即羥基。
在很多情況,示性式的羥基和氫氧根寫法相同,兩者很易混淆。
雖然氫氧根和羥基均為原子團,但羥基為官能基;而氫氧根為離子,每摩羥基有9摩電子;而每摩氫氧根有10摩電子,而且有氫氧根的物質在水溶液呈鹼性,而有羥基的物質在水溶液則多偏酸。
氫氧根和羥基在有機化學都親核。
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