Ground Triplet Spirobiradical: 2,2′,7,7′-Tetra(tert-butyl)-9,9′(10H,10′H)-spirobiacridine-10,10′-dioxyl
Ground Triplet Spirobiradical: 2,2′,7,7′-Tetra(tert-butyl)-9,9′(10H,10′H)-spirobiacridine-10,10′-dioxyl
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DOI：
10.1021/acs.orglett.9b00901
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发表时间：
2019-06-07
期刊：
影响因子：
5.2
通讯作者：
Ishida, Takayuki
中科院分区：
文献类型：
--
作者：
Kanetomo, Takuya;Ichihashi, Kana;Ishida, Takayuki
制备了新的螺二基2,2',7,7'-四(叔丁基)-9,9'(10H,10'H)-螺二吖啶-10,10'-二氧基。晶体学分析阐明了 D-2d 分子结构，表明 SOMO 的简并性。磁性研究表明，分子内铁磁耦合在 2J/k(B) = +23(1) K 下有效。据我们所知，铁磁耦合参数是顺磁螺化合物有史以来报道的最大参数。
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 D-2d molecular structure, suggesting the degeneracy of SOMOs. The magnetic study revealed that intramolecular ferromagnetic coupling was operative with 2J/k(B) = +23(1) K. To the best of our knowledge, the ferromagnetic coupling parameter is the largest ever reported for a paramagnetic spiro compound.