Ground Triplet Spirobiradical: 2,2′,7,7′-Tetra(tert-butyl)-9,9′(10 H,10′ H)-spirobiacridine-10,10′-dioxyl

Takuya Kanetomo, Kana Ichihashi, Masaya Enomoto, Takayuki Ishida

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A new spirobiradical, 2,2′,7,7′-tetra(tert-butyl)-9,9′(10H,10′H)-spirobiacridine-10,10′-dioxyl, was prepared. The crystallographic analysis clarified the D2d molecular structure, suggesting the degeneracy of SOMOs. The magnetic study revealed that intramolecular ferromagnetic coupling was operative with 2J/kB = +23(1) K. To the best of our knowledge, the ferromagnetic coupling parameter is the largest ever reported for a paramagnetic spiro compound.

Original languageEnglish
Pages (from-to)3909-3912
Number of pages4
JournalOrganic Letters
Issue number11
Publication statusPublished - 7 Jun 2019

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