CHEM 2OA3 Chapter Notes - Chapter 2: Functional Group, Formal Charge

• School: McMaster University
• Department: Chemistry
• Course: CHEM 2OA3
• Professor: Paul Harrison

Document Summary

Advantage of lewis structures is that all the bonds and atoms are shown explicitly, but only practical for small molecules. Partially condensed structures: bonds are not all drawn explicitly, practical for small molecules. Condensed structures: groups of atoms are clustered together, when possible, practical for small molecules. Molecular formula: shows the number of each type of atom in the compound. Triple bonds drawn in linear format rather than zigzag format because triple bonds involve sp-hybridized carbon atoms which have linear geometry. Never draw a carbon with more than 4 bonds. Functional group is a characteristic group of atoms/bonds that possess a predictable chemical behaviour. Formal charge is associated with any atom that does not exhibit the appropriate number of valence electrons. Formal charge = number of bonds + number of lone electrons.