L15_AcidBase2_08

L15_AcidBase2_08 - L15 Lewis Acids and Bases Lewis Acid...

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L15: Lewis Acids and Bases Lewis Acid: electron acceptor Lewis Base: electron donor Electron-deficient systems: AlCl 3 , BF 3 , SbF 5 , AsF 5
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1. Weak Lewis acids and bases 2. Metal ions as acids alkali and alkaline earth metals (groups I and II) are strong Lewis bases first step in formic carbonic acid Likewise: SO 2 + H 2 O H 2 SO 3
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Table of Acids by properties Strong HCl HBr HI H 2 SO 4 HNO 3 HClO 4 HClO 3 Most strong acids are oxoacids . Polar H-X bond. Weak HF H 2 SO 3 HNO 2 H 3 PO 4 HClO 2 HClO HBrO H 3 BO 3 CH 3 COOH C 6 H 5 OH Organic acids are weak acids. (Most are also oxo- acids ) http://www2.wwnorton.com/college/chemistry/gilbert/tutorials/ch16.htm 16.3, sections 3-5
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