Oxygen Double Bond

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Cynthia Anderson 3A
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Oxygen Double Bond

Postby Cynthia Anderson 3A » Sat Oct 17, 2015 5:26 pm

Why is it that oxygen always seems to form a double covalent bond?

Giovanna Park 3G
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: Oxygen Double Bond

Postby Giovanna Park 3G » Sat Oct 17, 2015 5:45 pm

Oxygen has six valence electrons. Therefore, to complete an octet, 2 more electrons are needed. The double bond formed by two oxygen atoms allows each oxygen to complete an octet.

LinaLi2E
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Oxygen Double Bond

Postby LinaLi2E » Wed Oct 21, 2015 12:33 pm

Oxygen tend to form double bonds because of the formal charge. A molecule is more stable when the atoms in the molecules have formal charges of zero. The formal charge for oxygen is zero when it has a double bond because the formal charge equals the valence minus the sum of the lone electrons and the quotient of the shared electrons and 2 [FC=VE-(L+(S/2))]. Oxygen has six valence electrons. When it forms a single bond, it has six lone electrons and two shared electrons. The formal charge of this is -1. When it forms a double bond, it has 4 lone electrons and 4 shared electrons. The formal charge is zero, which is more stable, thus oxygen tend to form double bonds but oxygen does not always form double bonds, there are times when oxygen form other bonds.


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