[高中] Lewis acid and base
Lewis acid and base
路易士的理論:
凡是可以接受外來電子對的分子、基團或離子為酸(路易士酸);凡可以提供電子對的分
子、基團或離子為鹼(路易士鹼)。
我看到一個例題
SO3 + H2O -> H2SO4 請分辨出Lewis acid 和 Lewis base
答案 H2O 是 Lewis base
但我無法理解為什麼
我認為這個反應的機制是:
1. H2O被拆成2部分 H+和OH-
2. SO3的S接收了OH-的O的孤對電子 形成共價鍵
3. SO3的其中一個O提供了孤對電子給H+ 形成共價鍵
我不確定我對此反應的機制理解是否正確
但如果是的話 那麼SO3同時是電子提供者和電子接受者 並不只是接受者 為什麼是路易
士酸呢?
是我認為的機制有錯誤 還是判斷路易士酸的方式不正確?
謝謝!!
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