Great confusion...

Asked by abhinay.bhatta | 1st Mar, 2010, 06:57: PM

Expert Answer:

See, AlCl3 is a covalent compound. So no question of Al3+.

Al has 3 valence electron which it shares with 3 Cl atoms to form 3 Al - Cl bonds.

This molecule is electron deficient as it has only 6 valence electrons and not 8.

So, to complete its electron deficiency, one of the Cl donates an electron pair to be shared between Al and Cl. This bond is a coordinate bond.

SImilarly, a second Cl donates an electron pair to be shared between Al and Cl of the other molecule.

Thus, the structure is as:

 

Answered by  | 2nd Mar, 2010, 02:13: PM

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