Define organic functional groups and use a general formula R-X. List some common functional groups which are present in aromatic hydrocarbons. Discuss alcohols and the alcohol functional group, OH. Review the nomenclature rules for naming alcohols, and use a few examples. Show the different ways of naming the same alcohol, using the official name, the common name, the usual name, and the old name. Define diols and triol alcohols, show structural formulas and discuss some usual and common names.