Organic Letters 2000-05-01

Triamino-s-triazine triradical trications. An experimental study of triazine as a magnetic coupling unit

Selby, Stickley, Blackstock

Index: Org. Lett. 2 , 171-174, (2000)

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Abstract

[structure: see text] Triamino-s-triazine derivatives 3a, 4, and 5 have been prepared, and their cationic states have been analyzed electrochemically. At 298 K, 3a+ has a limited lifetime in CH2Cl2 solution. However, 4+ and 5+ are long-lived under such conditions, and quartet states of 4(3+) and 5(3+) are observed by ESR spectroscopy. Variable-temperature ESR analysis and NMR shift susceptibility measurements indicate that 5(3+) is a doublet ground state with a populated quartet state.