Bond length  [ENDORSED]

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Joanna Huang
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Bond length

Postby Joanna Huang » Wed Dec 16, 2020 6:58 pm

How do you calculate bond length? (assuming you have drawn out the Lewis structure)

Andrew Dao 3C
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Joined: Wed Sep 30, 2020 9:41 pm

Re: Bond length

Postby Andrew Dao 3C » Wed Dec 16, 2020 7:31 pm

Bond length depends on the atoms bonding, so there is really no way for you to know without actual experimentally finding it. You can usually guess bond angle though, thanks to VSEPR theory.

Anh Trinh 1J
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Re: Bond length

Postby Anh Trinh 1J » Wed Dec 16, 2020 7:37 pm

I believe you are not able to calculate the bond length without through experiment. But single bonds are the longest, followed by double bonds, and the shortest are triple bonds!

Jeffrey Doeve 2I
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Re: Bond length

Postby Jeffrey Doeve 2I » Wed Dec 16, 2020 7:37 pm

To determine bond length, you would have to be given experimentally derived atomic radius. The bond length of a bond would be the radius of both atoms totaled up. This would be the internuclear distance and the length of the bond.

Brandon Carris
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Re: Bond length

Postby Brandon Carris » Wed Dec 16, 2020 7:39 pm

Could a neighboring atom in the molecule change the bond length too?

Chem_Mod
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Re: Bond length  [ENDORSED]

Postby Chem_Mod » Wed Dec 16, 2020 7:50 pm

Joanna Huang wrote:How do you calculate bond length? (assuming you have drawn out the Lewis structure)


For covalent bond: add the two covalent radii

For ionic bond: add the two ionic radii

Armen_Isayan_2L
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Joined: Wed Sep 30, 2020 10:09 pm

Re: Bond length

Postby Armen_Isayan_2L » Thu Dec 17, 2020 2:34 am

Hello! In order to detemrine the bond length we would have to consider the atomic radius. Utilizing the atomic radius, we would total the radius of the atoms up. If the bond in question is a covalent bond we would both the radius of the covalent bond and we would do the same for an ionic bond.

Adam_ElSayed_3B
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Joined: Wed Sep 30, 2020 9:48 pm

Re: Bond length

Postby Adam_ElSayed_3B » Thu Dec 17, 2020 2:36 am

We use VESPR theory and our knowledge of different compounds and their bond lengths, but I've only ever heard of it being done with a computer.

Nicole Bruno Dis 1B
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Re: Bond length

Postby Nicole Bruno Dis 1B » Thu Dec 17, 2020 3:40 am

The length of the bond can be determined by the number of bonded electrons (i.e. the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. The length of the bond between two atoms can also be thought of as the sum of the covalent radii of the two atoms.

205323697
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Re: Bond length

Postby 205323697 » Thu Dec 17, 2020 7:54 am

Does it matter if we have an ionic bond or covalent bond? Would we still calculate it the same way?


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