CHEM 2OA3 Chapter Notes - Chapter 2: Allyl Group, Formal Charge, Trigonal Planar Molecular Geometry

• School: McMaster University
• Department: Chemistry
• Course: CHEM 2OA3
• Professor: Harald Stover

Document Summary

Many different methods to represent the same structure. Lewis structures: advantage that all atoms and bonds are explicitly drawn, only practical for very small molecules. Partially condensed structures: c-h bonds are not drawn explicitly, only practical for small molecules. Condensed structures: no bonds are drawn, groups of atoms are clustered together when possible, only practical for small molecules with simple structures. Molecular formula: simply shows number of each type of atom in compound, no structural information is provided. None of above methods are convenient for larger molecules. How to read bond-line structures: drawn in zigzag format, where each corner or endpoint represents a carbon atom, double bonds are shown with two lines and triple bonds are shown with three lines. 2: note that triple bonds are drawn in a linear fashion rather than in a zigzag format because triple bonds involve sp-hybridized carbon atoms, which have linear geometry.