H Chem - Essential Oils and Terpenes

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What are essential oils?

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Essential oils are concentrated extracts of the volatile, non-water soluble aroma compounds from plants. They are mixtures of many different compounds.

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Where are essential oils commonly used?

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Essential oils are widely used in perfumes, cosmetic products, cleaning products, and as flavourings in foods.

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What are terpenes?

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Terpenes are unsaturated compounds formed by joining together isoprene (2-methylbuta-1,3-diene) units. They are key components in most essential oils.

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What role do terpenes play in plants?

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Terpenes can be oxidised within plants to produce some of the compounds responsible for the distinctive aromas of spices.

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How can an isoprene unit be identified in a terpene-based molecule?

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Given the structural formula for a terpene-based molecule, an isoprene unit can be identified within the molecule.

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What information can be stated about isoprene units in a terpene-based molecule?

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The number of isoprene units joined together within the molecule can be stated.

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