[kevsim]

I am a little confused with the double bond between oxygen and carbon.
Oxygen has 6 valence electrons and needs 2 more to satisfy the octet rule.
When it bonds to carbon with a double bond, that would satisfy the octet rule.
However, all diagrams I have seen shows the double bond and 2 lone Lewis structure pairs, why does'nt it show 3 lone pairs?
See attachment.

kevsim

[discodermolide]

How many electrons form the C=O system?

[kevsim]

discodermolide,
The Carbon atom requires 2 more bonds to complete its octet, which the Oxygen supplies.
The Oxygen atom requires 2 more bonds to complete its octet, which the carbon supplies.
Both should now be happy as they comply with the octet rule.
The Oxygen shows only 2 Lewis lone pairs, why not 3 lone pairs?
I am missing something, could you please explain where I am going wrong?

kevsim
 

[kevsim]

discodermolide,
Sorry to trouble you with this question, the penny just dropped all OK now.

kevsim

[Borek]

Care to explain what is your answer? At the moment thread is left "hanging", without any explanation.

[kevsim]

Borek,
Sorry for no explanation.
Oxygen has 6 valence electrons and requires 2 more to satisfy the octet rule.
When Carbon bonds to the Oxygen it shares 2 electrons of carbon and carbon shares 2 electrons of oxygen.
This then shows 2 lone Lewis diagram pairs.

See attachment.

kevsim