Non-Benzenic Hydrocarbons

The cyclic hydrocarbons cyclopropane CsHg, cyclobutane C4H8, cyclopentane C5H10, and cyclohexane C6H12 have no action on aluminium. 

Their higher homologues and their derivatives such as naphtenes, cyclenes, and terpenes, which occur naturally in certain crude oils, essences of flowers and in the roots of many plants and trees, also have no action on aluminium. The most common ones are menthadiene, pinene, terebenthine, which makes up the bulk of turpentine, and camphor. Aluminium equipment is widely used for the extraction, purification and storage of these products. 

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