organic chem

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joonkimdds

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I am taking organic chem now.

I just read that C = 1s^2 2s^2 2(px^1 py^1)

the p orbitals have one electrons each so it could overlap with the 1s orbitals of two H's to form two C-H sigma bonds. And it showed picture that look like

H
|
:C-H

and then it says
"The fact is, C combines with 4 H's to form four identical C-H sigma bonds in CH4."

if C has 6 valence electrons and 2 to recieve from H, how can it form 4 bonds? shouldn't it only form 2 bonds just like I drew up there and that's it?

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This has to do with hybridization of carbon. One of the electrons from the 2s orbital is promoted to the pz orbital. This enables carbon to form a tetrahedral shape which is sp three. This is 109.5 degrees. I hope this helps.A better explanation is given if you read the hybridization of carbon.
 
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