Skeletal structures converting other structural

Carbohydrates are the most abundant biomolecules on Earth. Each year, photosynthesis converts more than 100 billion metric tons of C02 and H20 into cellulose and other plant products. Certain carbohydrates (sugar and starch) are a dietary staple in most parts of the world, and the oxidation of carbohydrates is the central energy-yielding pathway in most nonphotosynthetic cells. Insoluble carbohydrate polymers serve as structural and protective elements in the cell walls of bacteria and plants and in the connective tissues of animals. Other carbohydrate polymers lubricate skeletal joints and participate in recognition and adhesion between cells. More complex carbohydrate polymers covalently... 

Make a model of one of the seven isomers of C4H10O and then convert it into the other alcohols (four total) and ethers (three total). Draw each structure. Identify skeletal, positional, and functional isomers. Determine if the alcohols are primary, secondary, or tertiary. 

Aromaticity. Some systems represent, internally to the computer, aromaticity as a property of bonds, other systems represent it as a property of atoms. The bond property may be associated with skeletal, single bonds, or it may be associated with explicit alternating double and single bonds. These alternative representations may be displayed graphically in a variety of forms, as mentioned above. The definition of aromaticity itself differs from one system to another. Such differences can create substantial problems in converting from one format to another. For example, consider the potential incompatibilities raised by the suite of simple structures 2-4. 

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