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Syntheses and Structural Studies of Tris(N-phenothiazinyl)borane and Its Radical Cation

Authors

  • Dr. Shuichi Suzuki,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)
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  • Kohei Yoshida,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)
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  • Dr. Masatoshi Kozaki,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)
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  • Prof. Dr. Keiji Okada

    Corresponding author
    1. Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)
    • Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)
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  • This work was partially supported by a Grant-in-Aid for Scientific Research from JSPS (22350066 to K.O.) and a Grant-in-Aid for Scientific Research on Innovative Areas “Emergence of Highly Elaborated π-Space and Its Function” from MEXT (23108717 to S.S.). S.S. also thanks the Asahi Glass Foundation and the Tokuyama Science Foundation for financial support.

Abstract

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A radical comparison: The neutral (1) and radical cation (1.+) forms of tris(N-phenothiazinyl)borane were prepared and their molecular structures and spectral properties investigated. The results established that 1.+ possessed a localized radical cation on one of the phenothiazine (PTZ) rings. The crystal structure of 1.+ showed elongation of the B[BOND]N bond bound to the PTZ.+ ring (B[BOND]N1: 1.53 Å).

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