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Heterocycles
Of course atoms other than carbon can occur as part of the cyclic structure. Such atoms, which are known as heteroatoms, e.g. N, O, S give rise to heterocycles. From a conformational analysis presepective, these heterocycles are, in general, very similar to the analogous hydrocarbons, check out the JSMOL images of a few common simple heterocylces shown below.
Tetrahydrofuran
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© Dr. Ian Hunt, Department of Chemistry |