dPP-ene; Discrete Unsaturated Oligopropylene

Discrete Unsaturated Oligopropylene (dPP-ene) is a family of precision oligomeric hydrocarbon chains containing both regular methyl branches and backbone carbon–carbon double bonds. The composite structural unit shown consists of one saturated propylene unit and one double-bond-containing propylene unit, providing a structurally defined model for studying the combined effects of methyl branching and backbone unsaturation. Backbone double bonds provide handles for hydrogenation, functionalization, and multisite conjugation. Double-bond geometry and side-chain stereosequence can also be considered in studies of segment conformation and packing. In this series, n denotes the total number of propylene structural units. The composite unit repeats n/2 times, so even-numbered n values are used.

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