1) How many lone pairs of electrons are there in NH3-BF3 ?

2) How many bond pairs of electrons are there in NH3-BF3?

With explanations.

No lone pairs


To determine the number of lone pairs of electrons in NH3-BF3, we need to first understand the molecular structures of NH3 (ammonia) and BF3 (boron trifluoride).

NH3 (ammonia) has a trigonal pyramidal shape, with the central nitrogen (N) atom bonded to three hydrogen (H) atoms and one lone pair of electrons. The lone pair resides in a region of space not involved in bonding.

BF3 (boron trifluoride), on the other hand, has a trigonal planar shape, with the central boron (B) atom bonded to three fluorine (F) atoms. There are no lone pairs of electrons on the central boron atom.

When NH3 and BF3 form a complex, they can interact through a coordinate covalent bond, with the lone pair on the nitrogen atom donating a pair of electrons to the empty orbital on the boron atom. This results in a new molecule, NH3-BF3 (ammonia borane),
with the following structure:

F
|
H — N — B
|
F
In the NH3-BF3 complex, the central boron atom still has three sigma bonds with three fluorine atoms. The nitrogen atom has donated its lone pair to form a coordinate bond with boron, resulting in the formation of a new bond. However, the nitrogen atom in the complex does not have any lone pairs remaining. Therefore, there are no lone pairs of electrons on the nitrogen atom in NH3-BF3.

In summary, there are no lone pairs of electrons in NH3-BF3.

Mikel99:
1) How many lone pairs of electrons are there in NH3-BF3 ?

2) How many bond pairs of electrons are there in NH3-BF3?

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9182736455O1999:

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Mikel99:
1) How many lone pairs of electrons are there in NH3-BF3 ?

2) How many bond pairs of electrons are there in NH3-BF3?

1. No lone pairs of electron
2. Have in mind that Bond pair also means shared pairs of electrons . Consequently, there are 7 bonding pairs .
This is because there are 3 bond pairs( shared pairs) in NH3 and 3 in BF3 and a 1 dative Bond between NH3-BF3 molecule. Total is 7 bonding pairs of electrons.

Mikel99:
1) How many lone pairs of electrons are there in NH3-BF3 ?

2) How many bond pairs of electrons are there in NH3-BF3?

..



1) Great question! To answer that, we first need to draw the Lewis structure for NH3-BF3. NH3 has three lone pairs of electrons, and BF3 has zero lone pairs of electrons. So, when the NH3 and BF3 bond, NH3 will share a lone pair of electrons with BF3, and BF3 will share a bonding pair of electrons with NH3. This results in a total of two lone pairs of electrons in NH3-BF3.


2) To answer this, we’ll look at the Lewis structure of NH3-BF3 again. In the NH3-BF3 molecule, NH3 has three bond pairs of electrons, and BF3 has three bond pairs of electrons. So, in total, there are six bond pairs of electrons in NH3-BF3.

To know the number of bonding and lone pair.

Firstly, the number of octect electron in N=5 and for H=1. Therefore drawing the Lewis structure, total number of electrons in NH3=5+1+1+1= 8 meaning we have 4 pair of electrons.

Sharing the electron, we have 3 bonding pair to H and 1 lone pair on N.

falcon01:


Here we go with ChatGPT again! People will become dumb and will just paste questions on it and give you answer. Can't you solve it yourself?

This type Technology will make people stupider and Lazy. There's no need to learn If an A.I can answer sh*t for you.

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9182736455O1999:

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The difference is Someone solved it. I can see many people asking chatGPT then pasting the answer here. And if a human solves it, its easier to understand