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Reshav posted an Question
August 17, 2020 • 21:16 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Why bondings and antibondings molecular orbitals form when atomic orbitals mixed acc to vbt why not only bmo form as abmo is higher in energy why does it formed

why bondings and antibondings molecular orbitals form when atomic orbitals mixed acc to vbt why not only bmo form as ABMO is higher in energy why does it formed then?

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    Priyanshu kumar Best Answer

    It is a balance. Technically, bonding, non-bonding, and anti-bonding are just descriptions of what we observe that happens at various energy levels for molecular orbitals. Orbitals, like energy and matter, cannot be created or destroyed. So, when atomic orbitals combine to form molecular orbitals, there are the same number. For every orbital that is reduced in energy, one is increased, to keep the overall potential energy the same. When atomic orbitals combine, one needs to be lower in energy for stability.

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    Got this reshav??

  • Suman Kumar best-answer

    Formation of bonding MO & antibonding MO is based on theory on which molecular orbital theory is based. It considers orbital as eletronic wave.

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    When wave interfere it underdo either constructive or destructive interference. We don't know. It depends on phase of the wave. So Here comes probability. We take both as an extreme case.

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    VBT is based on hybridization of AO of central atom. So Here is no concept of Molecular orbital.

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