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Terpenes
TERPENES
Figure 122.
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These are mainly found in plants and are what give many plants their fragrance. Terpenes used to be considered strictly hydrocarbons but there are those that are substituted as well. The isoprene unit or C5H8 is the building block of terpene molecules. These are assembled to give rise to terpenes, usually by a head to tail configuration. Figure 123 is the structure of isoprene and the structure of a simple terpene:
