Undecylenic Aldehyde, commonly known as 10-Undecenal or C11 Aldehyde, is an unsaturated aliphatic aldehyde containing an eleven-carbon chain and a terminal carbon-carbon double bond. Its molecular formula is C₁₁H₂₀O. The combination of an aldehyde functional group and terminal olefin makes it a useful specialty chemical for fragrance chemistry and organic synthesis.

The compound is particularly relevant to the fragrance sector, where long-chain unsaturated aldehydes are used for their characteristic odor properties. The terminal double bond also provides a useful functional handle for further chemical transformations, making Undecylenic Aldehyde relevant as a building block for specialty chemical synthesis.

Synonyms - 10-Undecenal; Undec-10-enal; 10-Undecen-1-al; Undecylenic Aldehyde; C11 Aldehyde; Undec-10-en-1-al.

Applications of Undecylenic Aldehyde

Fragrance Industry: Undecylenic Aldehyde is used as a fragrance ingredient in formulations where its characteristic long-chain unsaturated aldehyde odor profile is desirable. It is particularly relevant to the creation of specialty fragrance compositions.

Fine Fragrance and Perfume Chemistry: The compound can be incorporated into fragrance formulations as an odor-active material or used as a building block for preparing other fragrance molecules.

Specialty Chemical Synthesis: The aldehyde group provides a reactive site for transformations used in organic synthesis, while the terminal alkene provides an additional functional group that can be utilized in downstream chemical transformations.

Organic Synthesis: Undecylenic Aldehyde can serve as a C11 building block for synthesis of structurally more complex organic compounds. Its bifunctional character makes it useful where both aldehyde and alkene functionality are required within the same carbon framework.

Research and Development: Its combination of a terminal aldehyde and terminal alkene makes the compound useful as a research intermediate for investigating reactions involving unsaturated aldehydes and for preparing derivatives with an eleven-carbon chain.

Chemical Information

Undecylenic Aldehyde has the molecular formula C₁₁H₂₀O and a molecular weight of approximately 168.28 g/mol. Its systematic name is undec-10-enal. The molecule contains an aldehyde functional group at one end of the chain and a terminal carbon-carbon double bond at the opposite end.

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