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Science 21 July 1967:
Vol. 157. no. 3786, pp. 314 - 316
DOI: 10.1126/science.157.3786.314
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Articles

2-Dicyanomethylene-1,3-Indanedione: A New Electron Acceptor

Suprabhat Chatterjee 1

1 Air Force Cambridge Research Laboratories, L. G. Hanscom Field, Bedford, Massachusetts 01730

The electron affinity of 2-dicyanomethylene-1,3-indanedione (I) (1.33 ev), as computed from charge-transfer spectral analysis and from polarographic measurements of half-wave reduction potential, shows that the incorporation of the 2-dicyanomethylene moiety in 1,2,3-indanetrione (II) enhances its pgr-acid character. The electron spin resonance spectrum of the anion radical of I, generated electrolytically in solution, shows hyperfine structure that is due to two nitrogen atoms and four equivalent hydrogen atoms.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)