Absolute Configuration of a Tetrachloro Monoterpene from Plocamium cartilagineum

The molecular structure of the naturally occurring title compound 2,4,5-trichloro-1-chloroethyl-1,5-dimethylcyclohexane, C₁₀H₁₄Cl₄, consists of a cyclohexane ring in a chair conformation with three Cl atoms, two tertiary methyl groups and a chlorovinyl group as substituents. The absolute configuration was determined by the Flack test to be (1S,2R,4R,5S,1'E)-1,2,4-trichloro-5-(2'-chloroethenyl-1,5-dimethyl- cyclohexane). This compound is then a diastereomer of the similar one isolated from Plocamium hamatum J. Agardh. This species is noted for its insecticidal activity.

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