The weakest Lewis acid strength of BF_3 among boron halides can be exp

1.	The weakest Lewis acid strength of BF_3 among boron halides can be explained on the basis of
Answer» the most electronegative NATURE of F `P pi - P pi` back BONDING `d pi - p pi` back bonding bond ENERGY of B - F bond. Solution :`P pi - P pi` back bonding

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