The factor responsible for weak acidic nature of B-F bonds in BF₃ is

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

large electronegativity of fluorine

three centred two electron bonds in BF₃.

$pπ - dπ$ back bonding.

$pπ - pπ$ back bonding.

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

BF₃ is electron-deficient because B only has six valence electrons. B has one empty 2p orbital, while each F has three lone pairs of electrons. B and F have similar sizes, as a result, B and F orbitals show effective overlapping. Therefore, F can share one of its lone pairs with the unoccupied orbital of B. This results in the formation of $pπ - pπ$ back bonding. This provides additional strength to the B-F bond and makes the B-F bond less acidic.

Watch 3-min video & get full concept clarity