Wednesday, June 14, 2017

bond - Why is Aluminium Chloride a Lewis Acid if it's an ionic compound?


In my textbook it says in the reaction AlClX3+ClXAlClX4X, Aluminium Chloride (AlClX3) has six valence electrons and accepts a lone pair from ClX, but wouldn't that mean the aluminium atom covalently bonded with the three chlorine atoms to get six electrons (which is wrong as it's ionic)?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, MgX2+ is closest in radius to LiX+. Is this true, and if so, why would a whole larger shell ($\ce{...