Nomenclature II

1
Nomenclature II

• Naming complex compounds

2
Oxidation Number

• A method of naming compounds by determining
  apparent charge
• The apparent charge on the nonmetal never
  changes add up the total negative charges- the
  number of total positive charges must balance the
  formula.

3
Examples

• MnBr4 What is the name of this compound?
• What is the charge on bromide?
• 1 How many total negative charges?
• 4
• If only one Mn is present, what is the apparent
  charge
• 4 Name of the compound?
• Manganese (IV) bromide. Traditional name?
• Manganic bromide

4
Example II

• P2S5 What is the name of this compound?
• What is the charge on sulfide? 2 Total negative
  charges?
• -10
• There are 2 phosphorus present. What is the
  apparent charge on each one to neutralize the
  compound?
• 5
• Name of the compound? Use Stock name.
• Phosphorus (V) sulfide Traditional name?
• Phosphorous sulfide Note the change in
  spelling
• Prefix name?
• Diphosphorus pentasulfide

5
Oxygenated Polyatomic ions

• Many polyatomic ions are related
• The only difference is the number of oxygen atoms
  present in the polyatomic unit
• So2-2 hyposulfite Latin prefix meaning below
• SO3-2 sulfite
• SO4-2 sulfate
• SO5-2 persulfate