Verdazyls are heterocyclic stable free radicals based on the tetrazane ring system. Synthesis of 1,5-diisopropyl-6-oxoverdazyls usually proceeds in good yield through oxidation of the corresponding tetrazane with 1,4-benzoquinone. Recently however we have discovered that excess benzoquinone in this reaction results in novel diamagnetic species with chromophores that absorb in the visible region. We report the elucidation of the structure of these novel products through standard spectroscopic techniques.

Novel side products from synthesis of 6-oxoverdazyls

248th National Meeting (2014)

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