Molecular Geometry

Review Packet

 

Objectives:

  • How to draw Lewis symbols for atoms and Lewis structures for molecular compounds and polyatomic ions
  • How to draw resonance structures
  • How to assign molecular shapes using the VSEPR Theory for molecules, polyatomic ions, and multi-centered molecules and polyatomic ions, through the octahedral shape
  • How to assign hybrid orbitals to central atoms of molecules and polyatomic ions
  • Dipole moments
  • Valence Bond Theory
  • Sigma and pi bond

 

Chapters 2, 9, 10

 

Equations (from yellow sheet)

            None

 

Notes

I.          VSEPR Theory

            A.        Electron-pair arrangements

            B.        Relationship between bond angles and nonbonding electrons

            C.        Molecular geometry

                        1.         Linear

                        2.         Trigonal planar

                        3.         Tetrahedral

                        4.         Trigonal bipyramidal

                        5.         Octahedral

            D.        Dipole moments

·         Working with vectors

 

II.        Valence Bond Theory

            A.        Hybridization

            B.        Sigma and pi bonds

            C.        Bond length, bond order, and bond dissociation energy

            D.        Diamagnetism

            E.         Paramagnetism

 

III.       Lewis Structures

            A.        Resonance

            B.        Exceptions to the octet rule