The structures and properties of polyatomic molecules

The following sections are included:

• Valence shell electron pair repulsion theory (VSEPR)

• The theory of hybrid orbitals

• Delocalized molecular orbital theory

• HMO and the structure of conjugated molecule

  • HMO Theory

  • The HMO treatment of butadiene

  • The HMO treatment of cyclic conjugated polyene (C_nH_n)

  • Delocalized π bonds and the properties of molecules

• Symmetry of molecular orbitals and reaction mechanism

  • Some principles and concepts related to chemical reactions

  • Frontier-orbital theory

  • The Woodward-Hoffmann rules

• The bond lengths of bond energies of covalent bonds

  • The covalent bond length and the atomic covalent radii

  • The bond energy for a covalent bond

• Intermolecular interaction and the sizes and shapes of molecules

  • The interacting forces between molecules

  • Van der Waals' attraction and van der Waals' radii

  • The sizes and shapes of molecules

• Nuclear magnetic resonance spectroscopy

  • Nuclear magnetic moment and the principles of nuclear magnetic resonance

  • Chemical shifts

  • Nuclear spin-spin coupling

• Problems 5