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Why carbon cannot form tetravalent bond …

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Why carbon cannot form tetravalent bond with itself
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Meghna Thapar 5 years, 1 month ago

The reason a carbon atom cannot bond with four electrons with another carbon is due to the carbon electron orbitals. Since it has a s and 3 p orbitals, it must create one sigma and at most 2 pi bonds with another carbon. Hence, you'll have to bond them with another atom. Carbon can not form 4 bonds with another carbon because of its orbitals which are some time hybridized. ... In case of ethyne it shows sp hybirdization and two p unhybird orbitals forms two pi bonds with other atom and two hybrid orbitals forms sigma bonds one with carbon and other with hydrogen.

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