Hybridization and Valence Bond Theory (U1)

4 important questions on Hybridization and Valence Bond Theory (U1)

When does covalent bond occur?

  • When two 1/2 filled (singly occupied) orbitals overlap
  • ea. e- has ability to roam the entire region of ea. Orbital

Name types of sigma bonds

  1. S-s --> Ex: H2
  2. s-p --> Ex: HCl
  3. p-p --> F2
  4. s-sp --> CH4

What is a pi (⨅) bond

Overlap of adjacent p orbitals (must be unhybridized) above & below nuclear axis
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When is it possible to have a pi bond?

  • When sigma σ is present (1st) btwn bonded nuclei (pulls them together so ⨅ bond can form
  • when atoms have p orbitals containing only lone e-s (singly occupied unhybridized p)

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