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
Posts: 51
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?

405716590
Posts: 100
Joined: Fri Sep 24, 2021 5:35 am

Re: Bond length

Postby 405716590 » Wed Oct 27, 2021 8:17 pm

you don't really know it since they are specific to molecules and you want to calculate it plus he said we didn't need to know that

Nishan Reddy 3K
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Joined: Fri Sep 24, 2021 5:28 am

Re: Bond length

Postby Nishan Reddy 3K » Sun Oct 31, 2021 11:58 pm

Bond length is usually not calculable without certain information but in general, singly bonds have the longest bond length whereas it gets smaller and smaller as bonds between the atoms are added.

Emily Widjaja 3A
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Joined: Fri Sep 24, 2021 5:38 am

Re: Bond length

Postby Emily Widjaja 3A » Thu Nov 04, 2021 1:40 pm

I don't think you are required to calculate bond length, but just remember that single bonds are the longest. Using VESPR, you can appproximate bond angles though

Hannah Thornton 1F
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Joined: Fri Sep 24, 2021 5:53 am

Re: Bond length

Postby Hannah Thornton 1F » Sun Nov 07, 2021 4:53 pm

We are unable to determine bond length without knowing the atomic radius. However, we do know that single bonds are the longest, followed by double bonds, and triple bonds are the shortest.


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