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Staudinger and Brusson, Annalen, 447, 103, 110 (1926), and Carmondy, Sheehan and Kelly, Indust. Eng. Chem., 30, 245 (1938), prepared polycyclopentadienes and suggested repeating units as in (Ic) or (Id); it is possible that some of the polycyclopentadienes described in the recent patent literature are also built up according to this latter structural principle; cf., for example, Soddy, U.S.A. Patent, 2319271.
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Hausser, Kuhn and Smakula, Z. phys. Chem. (B), 29, 384 (1935). Karrer and Jucker, “Carotinoide” (Basle, 1948). Blout and Fields, J. Amer. Chem. Soc., 70, 189 (1948).
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Nernst and Hohmann, Z. phys. Chem., 11, 352 (1893). Clark, Ph.D. thesis, University of Missouri (1937). Wassermann (unpublished experiments).
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EISLER, B., WASSERMANN, A., FARNSWORTH, F. et al. Catalytic Conversion of a Diene into Deeply Coloured Polyenes. Nature 168, 459–461 (1951). https://doi.org/10.1038/168459a0
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DOI: https://doi.org/10.1038/168459a0
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