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CHEM 3342 Functional Groups - Functional Groups Molecules...

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Functional Groups Molecules can be defined by the functional groups they contain. It is useful to think about molecules in terms of functional groups because molecules that have the same functional group will have similar reactivity . For example, benzoic acid and butanoic acid are carboxylic acids. They both donate a proton to a base. Ethylamine and cyclohexanamine are both bases due to the presence of the amino group. The molecule shown below is the antibiotic tetracycline. It contains three alcohols, a phenol, a ketone, an amine, and amide, and a benzene ring. It also contains an enol, which is not on your list. The part that is not circled can be classified as the alkane functional group, which can be found in most organic molecules. O OH OH O benzoic acid butanoic acid NH 2 NH 2 cyclohexanamine ethanamine N OH O NH 2 OH OH O OH OH phenol alcohol alcohol alcohol enol (alk en e + alcoh ol ) amide amine ketone benzene
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Functional Group Worksheet, page 2 of 6 When you are assigning functional groups,
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