Chemistry Chapter 7

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Author:
misol
ID:
298205
Filename:
Chemistry Chapter 7
Updated:
2015-03-11 19:51:28
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Chemistry Sacco Chapter
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chemistry sacco chapter 7
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  1. VESPR Model
    Valence Shell Electron Pair Repulsion 

    Pairs of electrons in valence shell repel one another to rearrange themselves as far apart as possible (pairs = bonds or pairs of electrons)
  2. Has to do with...
    CENTRAL ATOMS!
  3. polarity
    need to consider geometry and electronegativity
  4. Let's say... you had 
    *Identical Bonds
    Symmetrically distrbuted around central atom 
    And NO lone pairs
    Molecule is nonpolar even though bonds are polar

    but the bonds have to be IDENTICAL
  5. Valence Bond Theory (VBT)
    atoms share electrons when atomic orbitals on one atom OVERLAPS with an atom orbital on another atom
  6. Hybridization of Atomic Orbital
    When orbitals mix to become hybrids

    Consider: molecular geometry and electron promotion/excitement
  7. Hybridization and Multiple Bonds
    Molecules with multiple bonds occurs when electrons are in UN-hybridized orbitals
  8. 2 different kinds of bonds
    • 1. σ (sigma) bond
    • e- density is located b/t internuclear axis

    • 2. Π (pi) bonds
    • sideways p orbital overlap (parallel)

    (3. triple bond)
  9. bonds
    • single = σ
    • double =σ + Π
    • triple = σ + 2Π

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