Letter | Published:

Polymerization of a Semiquinone Ion

Nature volume 159, page 612 (03 May 1947) | Download Citation



THE most recent theory of the structure of Wurster type dyes (oxidation products of p-phenylenediamines) is that of Granick and Michaelis1. One of their main conclusions was that polymerization of a semiquinone ion of the type depicted below is impossible when all the amino hydrogens are substituted. In support of this conclusion, they instanced the existence of a crystalline perchlorate of Wurster's Blue (the oxidation product or δ-salt of tetramethyl paraphenylenediamine)2 the paramagnetism of which indicates the presence in the molecule of one unpaired electron.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    , and , J. Amer. Chem. Soc., 65, 1747 (1943).

  2. 2.

    The paramagnetism of the perchlorate of Wurster's Blue was first studied by , Z. Phys., 87, 242 (1933).

Download references

Author information


  1. Department of Organic and Applied Chemistry, Department of Chemistry, University of Sydney. Feb. 27.

    • G. K. HUGHES
    • , N. HUSH
    •  & D. P. MELLOR


  1. Search for G. K. HUGHES in:

  2. Search for N. HUSH in:

  3. Search for D. P. MELLOR in:

About this article

Publication history





By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.