Bond Length (Chapter 3.16 of 6th Edition)

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Joussie Camacho 4I
Posts: 33
Joined: Tue Oct 02, 2018 12:16 am

Bond Length (Chapter 3.16 of 6th Edition)

Postby Joussie Camacho 4I » Tue Nov 27, 2018 9:56 pm

In the textbook it says that multiple bonds are shorter than single bonds between the same two elements, but doesn't that also apply to bonds between different elements? Ex: CO, CO2, CO3^2-. The two elements are different, but when I drew out the Lewis structures for all three of them, that rule still applied because the C-O bonds in CO3^2- were longer than in CO2, which were longer than in CO. Is the C-O bond just an exception?

Kessandra Ng 1K
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Bond Length (Chapter 3.16 of 6th Edition)

Postby Kessandra Ng 1K » Tue Nov 27, 2018 10:06 pm

I think that multiple bonds will always be shorter than single bonds, no matter which elements are involved - i.e. if the elements are the same or different. This is because the more bonds there are, the more electrons that are shared between the atoms, and hence the stronger the bond.

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