User:Benjah-bmm27/degree/3/JPHC

Group theory in chemistry, JPHC

• The uses of group theory in describing and understanding molecular symmetry
  • Symmetry elements
    • Identity element
  • Symmetry operations
  • Schönflies notation
  • Point groups
    • Point groups in three dimensions
    • List of character tables for chemically important 3D point groups
    • Crystallographic point groups
  • Group representations
    • Irreducible representations

Examples of molecules in each point group

• C₂: hydrogen peroxide, dioxygen difluoride, methanediol
• C_2v: water, sulfur dichloride, oxygen difluoride, dichloromethane
• C_3v: ammonia, phosphine, methyl iodide
• C_∞v: methylacetylene, chloroacetylene; any heteronuclear diatomic molecule, e.g. hydrogen chloride, nitric oxide, carbon monoxide
• S₄: pentaerythritol, PETN, orthocarbonic acid
• D_5d: ferrocene
• D_5h: ruthenocene
• D_∞h: carbon dioxide, acetylene; any homonuclear diatomic molecule, e.g. dihydrogen, dinitrogen, dioxygen