## Coordinate covalent bond?

Gwynneth Orlino 1B
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Joined: Wed Nov 21, 2018 12:18 am

### Coordinate covalent bond?

We went over this in lecture today, but I'm still confused on what exactly a coordinate covalent bond is. Can someone help explain this?

Posts: 31
Joined: Mon Jun 17, 2019 7:23 am

### Re: Coordinate covalent bond?

Imagine I have ammonia, NH3 and Boron trifluoride, BF3. Ammonia has a lone pair of electrons on the nitrogen atom, and boron in the boron trifluoride only has 6 electrons not filling its octet. So in this scenario when the two molecules react, what occurs is the nitrogen is found to donate both of its electrons to the boron and they both have a filled octet. This occurs due to Nitrogen having a partial negative charge ($\delta ^{-1}$)
and boron having a partial positive charge ($\delta ^{+1}$).

So a coordinate covalent bond is a bond in which the electrons shared between two atoms come from one element alone.

Gwynneth Orlino 1B
Posts: 26
Joined: Wed Nov 21, 2018 12:18 am

### Re: Coordinate covalent bond?

In that case, NH3 is the base and BF3 is the acid, yes?

Posts: 31
Joined: Mon Jun 17, 2019 7:23 am

### Re: Coordinate covalent bond?

That’s correct!

Gwynneth Orlino 1B
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Joined: Wed Nov 21, 2018 12:18 am

### Re: Coordinate covalent bond?

Okay, thank you!!

Posts: 31
Joined: Mon Jun 17, 2019 7:23 am

### Re: Coordinate covalent bond?

No Problem

Yen Ho Chou 1D
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Joined: Wed Feb 27, 2019 12:16 am

### Re: Coordinate covalent bond?

it's when an atom gives both electrons to make the bond. The tow electrons in the bond are from the same atom

BCaballero_4F
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Joined: Wed Nov 14, 2018 12:22 am

### Re: Coordinate covalent bond?

A coordinate covalent bond is between an acid and a base where one acts and the lone electron donor and the other acts as the lone electron acceptor.

Maeve Miller 1A
Posts: 51
Joined: Fri Aug 09, 2019 12:16 am

### Re: Coordinate covalent bond?

A coordinate covalent bond is a bond in which the 2 shared e- come from one element alone; this is different from a typical covalent bond in that e- often come from multiple elements. In this scenario, there is a donor (a Lewis base) and an accepter (a Lewis acid). Hope this helps!

Luyan Zhang - 2D
Posts: 103
Joined: Sat Jul 20, 2019 12:16 am

### Re: Coordinate covalent bond?

Usually, a bond is composed of two electrons, and one coming from each of the bonded atom. A coordinate covalent bond refers to a bond in which BOTH electrons come from ONE atom, as in the case of BF4, when both electrons came from the fluoride ion.

Debora Fernandez Clemente_ 4H
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Joined: Wed Sep 18, 2019 12:21 am

### Re: Coordinate covalent bond?

I know understand what a coordinate covalent bond is but, how did you know what compound was a base or an acid?

405268063
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Joined: Thu Jul 25, 2019 12:17 am

### Re: Coordinate covalent bond?

The acid would be the electron acceptor and the base is the electron donor.

Shanzey
Posts: 120
Joined: Wed Sep 18, 2019 12:20 am

### Re: Coordinate covalent bond?

Debora Fernandez Clemente_ 4H wrote:I know understand what a coordinate covalent bond is but, how did you know what compound was a base or an acid?

A Lewis acid accepts electrons, while the Lewis base donates electrons, usually as lone pairs.