Boron trifluoride (BF3) does not have protons, but it can still act as an acid. This is because it is an electron-deficient compound and can accept electron pairs, which makes it a Lewis acid. On the other hand, ammonia (NH3) has a lone pair of electrons that it can donate, making it a Lewis base.
When BF3 and NH3 react, BF3 accepts the lone pair of electrons from NH3, forming a coordinate bond and completing its octet¹. The reaction is as follows:
NH3 + BF3 => H3N:BF3
In this reaction, BF3 is the Lewis acid and NH3 is the Lewis base. The bond formed between them is a coordinate covalent bond, also known as a dative bond. This type of bond is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom. The atom donating the electron pair is called the donor (NH3 in this case), and the atom accepting the electron pair is called the acceptor (BF3 in this case).
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Answer:
BF3 is electron deficient and hence acts as Lewis acid. : NH3 has one lone pair which it can donate to BF3 and form a coordinate bond.
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Verified answer
Boron trifluoride (BF3) does not have protons, but it can still act as an acid. This is because it is an electron-deficient compound and can accept electron pairs, which makes it a Lewis acid. On the other hand, ammonia (NH3) has a lone pair of electrons that it can donate, making it a Lewis base.
When BF3 and NH3 react, BF3 accepts the lone pair of electrons from NH3, forming a coordinate bond and completing its octet¹. The reaction is as follows:
NH3 + BF3 => H3N:BF3
In this reaction, BF3 is the Lewis acid and NH3 is the Lewis base. The bond formed between them is a coordinate covalent bond, also known as a dative bond. This type of bond is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom. The atom donating the electron pair is called the donor (NH3 in this case), and the atom accepting the electron pair is called the acceptor (BF3 in this case).
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