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Maximum $pπ - pπ$ back bonding exists in

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a

BCl3

b

BI3

c

BBr3

d

BF3

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detailed solution

Correct option is D

In BF3, boron atom has vacant 2pz A.O. and fluorine atom has electron pair in 2p A.O. So, maximum overlapping is possible between vacant 2pz A.O. of boron and fully filled 2p A.O. of fluorine due to similar size of A.O. of boron and fully filled 2p A.O. of fluorine due to similar size of AO's.

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Similar Questions

The correct order of matching of the following compounds is

(A) Borazine

(B) Plaster of Paris

(C) Boric acid

(C) Qwartz

(E) Buckminsterfullerene

(i) $C a S O_{4} . \frac{1}{2} H_{2} O$

(ii) C₆₀

(iii) SiO₂

(iv) B₃N₃H₆

(v) H₃BO₃

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