# looking for the absorption spectrum of polyene

I am looking for the absorption spectrum of linear polyenes (1,3,5-hexatriene, 1,3,5,7-Octatetraene, 1,3,5,7,9-decapentaene, etc..) in the range of UV and Visible light wavelength.

I see the data at the 2nd page of the PDF (*1). In the table, I see the max absorption wave length for hexatriene is 268nm.

name $$\lambda_{max}$$
ethylene 163nm
The absorbance due to the π – π* transition in 1,3,5-hexatriene, for example, occurs at 258 nm.

• @ porphyrin: According to this article, both isomers of hexatriene shows absorbance at $245, 255,$ and $\pu{265 nm}$. Jan 25 at 22:20