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Catalytic Conversion of a Diene into Deeply Coloured Polyenes

Naturevolume 168pages459461 (1951) | Download Citation


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  1. 1

    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.

  2. 2

    Cf. Weiss, J. Chem. Soc., 245 (1942).

  3. 3

    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).

  4. 4

    Rubin, Steiner and Wassermann, J. Chem. Soc., 3046 (1949).

  5. 5

    Alder and Stein, Annalen, 504, 216 (1933).

  6. 6

    Nernst and Hohmann, Z. phys. Chem., 11, 352 (1893). Clark, Ph.D. thesis, University of Missouri (1937). Wassermann (unpublished experiments).

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  1. William Ramsay and Ralph Forster Laboratories, University College, London

    • B. EISLER
    •  & DR. A. WASSERMANN
  2. Petrocarbon, Ltd., Manchester

    • Dr. F. D. FARNSWORTH
  3. Manchester Oil Refinery, Ltd., Manchester

    •  & DR. R. SCHNURMANN


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