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VSEPR

VSEPR model - valence-shell electron-pair repulsion model

 

  • bond angles - determines shape of molecules
  • electron domain - area where electrons are most commonly found
    • bonding pair - electrons between 2 atoms in bonds
    • nonbonding pair - lone pair of electrons not shared
  • nonbonding pairs, multiple bonds have greater repulsive forces on nearby electron domains than single bonds
  • best arrangement minimizes repulsions between electron domains
  • electron-domain geometry - determines arrangement of electron domains
  • molecular geometry - determines arrangement of atoms
  • atoms beyond 3rd period can have over 4 pairs of electrons around it (has extra d subshell)

linear electron-domain geometry

 

  • electron domain geometry
    • 2 electron domains
  • molecular geometry

trigonal planar electron-domain geometry

 

  • electron domain geometry
    • 3 electron domains
  • molecular geometry

tetrahedral electron-domain geometry

 

  • electron domain geometry
    • 4 electron domains
  • molecular geometry

trigonal bipyramidal electron-domain geometry

 

  • electron domain geometry
    • 5 electron domains
  • molecular geometry

octahedralelectron-domain geometry

 

  • electron domain geometry
    • 6 electron domains
  • molecular geometry
Subject: 
Chemistry
Subject X2: 
Chemistry

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