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The infra-red spectrum of cyclobutane in the range 2 to 25μ has been obtained, together with the Raman spectrum of the same material. Analysis of these spectra, together with a normal coordinate treatment of the problem, has led to a tentative assignment of the fundamentals which explains all features of the observed spectra. Butene-1 has been identified as a product of the liquid phase photolysis of cyclopentanone.
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Thomas P. Wilson (1943) studied this question.
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