Asked by Matthew Torres on Apr 27, 2024

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From a molecular orbital perspective why isn't there relatively free rotation about the carbon-carbon double bond in ethene (CH2=CH2)?

Molecular Orbital

A mathematical function describing the wave-like behavior of an electron in a molecule. This concept is central to understanding chemical bonding and the electronic structure of molecules.

Carbon-carbon Double Bond

A type of chemical bond where two carbon atoms share two pairs of electrons, forming a stronger bond than a single bond.

Ethene

A colorless flammable gas with a faint sweet and musky odor, the simplest alkene with the chemical formula C2H4, used as a petrochemical precursor.

  • Utilizing molecular orbital theory to elucidate the bonding and structure of molecules.
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ZK
Zybrea KnightMay 03, 2024
Final Answer :
Two carbon p atomic orbitals overlap side-to-side and in phase to form the π bond that is present. Rotation about the carbon-carbon bond axis requires quite a bit of energy because the π bond is broken as the overlap between the two p orbitals is disrupted.