Why does the Lewis acid strength of boron halides follow the order B B

1.	Why does the Lewis acid strength of boron halides follow the order B Br_3gt BCl_3 gtBF_3 ?
Answer» `BF_3 GT BCl_3 gt B Br_3` `B Br_3 gt BCl_3 gt BF_3` `BCl_3 gt BF_3 gt B Br_3` `BCl_3 gt B Br_3 gt BF_3` SOLUTION :`B Br_3 gt BCl_3 gt BF_3`

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