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| 1. |
Boron tribromide is a stronger acid than boron trifuoride. Assign reason. |
| Answer» Solution :Both of them are LEWIS acids but becaue of `p pi-p pi` BACK BONDING the elecron density on boron atom INCREASE and the Lewis acid strength of the halides . Now, 2p orbitals of boron and fluorine that are involed in back b onding have comparable energies. while p orbtials of boron and 4p orbtials of bromine differ LARGELY in energy and the b ack bonding is not so efficient. therefore, `BBr_(3)` is a stronger acid than `BF_(3)`. | |