Advanced Materials

Crystals of an antiferromagnetic 1,3-butadiyne compared with a ferromagnetic 1,3,5-hexatriyne carrying a 4-Chloro-3-(N-tent-butyl-N-oxyamino)phenyl Group as a Persistent Free Radical Substituent

Authors

  • Katsuya Inoue,

    Corresponding author
    1. Department of Chemistry, Faculty of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113 (Japan)
    • Department of Chemistry, Faculty of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113 (Japan)
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  • Prof. Hüzu Iwamura

    1. Department of Chemistry, Faculty of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113 (Japan)
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  • This work was supported by a Grant-in-Aid for Specially Promoted Research (No. 03102003) from the Ministry of Education, Science and Culture, Japan. We thank Drs. Hiroki Oshio and Noboru Koga for their assistance with the X-ray crystal structure analysis.

Abstract

Persistent organic radicals with a ferromagnetic interaction in the crystalline state are few and far between. One example is crystalline 1,3,5-hexatriyne carrying a [4-chloro-3-(N-tert-butyl-N-oxyamino)-phenyl] substituent at position 1. This has been studied and compared with crystalline 1,3-butadiyne (see Figure) carrying the same substituent, which, in contrast, exhibits antiferromagnetic interactions at cryogenic temperatures.

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