Double and Triple Bonds

(Polar molecules, Non-polar molecules, etc.)

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Shuyi Yu 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Double and Triple Bonds

Postby Shuyi Yu 1B » Sat Nov 17, 2018 2:38 pm

In a double or triple bond why is the region of electron density equal one instead of two or three?

Lynsea_Southwick_2K
Posts: 55
Joined: Fri Sep 28, 2018 12:25 am

Re: Double and Triple Bonds

Postby Lynsea_Southwick_2K » Sat Nov 17, 2018 6:25 pm

The second rule of the VSEOR model is:

"Rule 2 There is no distinction between single and multiple bonds: a multiple
bond is treated as a single region of high electron concentration.

That is, the two electron pairs in a double bond stay together and repel other
bonds or lone pairs as a unit. The three electron pairs in a triple bond also stay
together and act like a single region of high electron concentration. For instance,
a carbon dioxide molecule, has a linear structure similar to that of
BeCl2, even though both bonds are double bonds"

This comes from the textbook, hope it helps a bit.

Dong Hyun Lee 4E
Posts: 68
Joined: Fri Sep 28, 2018 12:23 am

Re: Double and Triple Bonds

Postby Dong Hyun Lee 4E » Sat Nov 17, 2018 6:55 pm

Any bond will be considered as a single electron region as it acts like one region together. Just because it is a triple or double bond does not make the bond act as three or two different electron regions.


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