Abstract
The ultraviolet absorption spectra of trans-1,3-butadiene, 1,1,4,4-trans-1,3-butadiene-d4, and trans-1,3-butadiene-d6 between 2300 and 1350 Å have been recorded and analyzed. Four Rydberg series were identified (δ=0.087, 0.21, 0.42, and 0.67). A transition-by-transition comparison of this analysis with those in the literature shows that several of the previously assigned transitions are misidentified. A continuum originating around 1450 Å is reported.

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