The power of halides of boron to act as Lewis acids decreases in the order

Question

The power of halides of boron to act as Lewis acids decreases in the order (A) BF3 > BCl3 > BBr3 (B) BBr3 > BCl3 > BF3 (C) BCl3 > BF3 > BBr3 (D) BCl3 > BBr3 > BF3

Tardigrade Admin · Accepted Answer

Order of Lewis acid strength of boron halides is BI3 > BBr3 > BCl3 > BF3 This order is explained on the basic of p π - p π back bonding opposite to expected order due to electronegativity

Q. The power of halides of boron to act as Lewis acids decreases in the order

$B F_{3} > BC l_{3} > BB r_{3}$

$BB r_{3} > BC l_{3} > B F_{3}$

$BC l_{3} > B F_{3} > BB r_{3}$

$BC l_{3} > BB r_{3} > B F_{3}$

Order of Lewis acid strength of boron halides is
$B I_{3} > BB r_{3} > BC l_{3} > B F_{3}$
This order is explained on the basic of $p π - p π$ back bonding opposite to expected order due to electronegativity

Q. The power of halides of boron to act as Lewis acids decreases in the order

BF3​>BCl3​>BBr3​

BBr3​>BCl3​>BF3​

BCl3​>BF3​>BBr3​

BCl3​>BBr3​>BF3​

Order of Lewis acid strength of boron halides is BI3​>BBr3​>BCl3​>BF3​ This order is explained on the basic of pπ−pπ back bonding opposite to expected order due to electronegativity

$B F_{3} > BC l_{3} > BB r_{3}$

$BB r_{3} > BC l_{3} > B F_{3}$

$BC l_{3} > B F_{3} > BB r_{3}$

$BC l_{3} > BB r_{3} > B F_{3}$

Order of Lewis acid strength of boron halides is
$B I_{3} > BB r_{3} > BC l_{3} > B F_{3}$
This order is explained on the basic of $p π - p π$ back bonding opposite to expected order due to electronegativity