Abstract The four geometrical isomers of 1, 3, 5-undecatriene, 1a–d have been prepared (stereospecifically and non-stereospecifically), using either (1) the Wittig reaction,(2) thermal sigmatropic hydrogen shifts,(3) partial reduction of triple bonds by zinc, or (4) organocopper reagents. The thermal behaviour of the four 1, 3, 5-undecatrienes has been investigated and the products formed have been characterized. The spectra of 1a–d, and of related ...
