BF_(3)does not have proton but still acts as an acid and reacts with NH_(3). Why is it so ? What type of bond is formed between the two ?

BF_(3)does not have proton but still acts as an acid and reacts with N

1.	BF_(3)does not have proton but still acts as an acid and reacts with NH_(3). Why is it so ? What type of bond is formed between the two ?
Answer» Solution :`BF_(3)` is ELECTRON deficient and HENCE ACTS as Lewis ACID. : `NH_(3)` has one lone pair which it can donate to `BF_(3)` and form a coordinate bond. Hence, `NH_(3)` acts as a Lewis base `(H_(3)N : rarr BF_(3))`.