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Maximum p pi-p pi back bonding exists in...

Maximum `p pi-p pi` back bonding exists in

A

`BCl_(3)`

B

`BF_(3)`

C

`BBr_(3)`

D

`BI_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
In `BF_(3)` boron atom has vacant `2p_(z)A.O.` and fluorine atom has electron pair in 2p A.O. so, maximum overlapping is possible between vacant `2p_(z) A.O.` of boron and fully filled 2p A.O. of fluorine due to similar size of A.O.s.
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