Chemistry, asked by ravikumarchauhan90, 1 year ago

Why BF3 is less lewis acid than BCl3 ?

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Answered by adarsh2627

These F orbitals can overlap with the orbital on B, thereby increasing the electron density on the boron atom and making it less acidic.This effect is called backbonding, because electron density is leaving the more electronegative atom. ... Hence, the greater back bonding in BF3 makes it aweaker Lewis acid.

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