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Preparation of N-(2-alkoxyvinyl)sulfonamides from N-tosyl-1,2,3-triazoles and Subsequent Conversion to Substituted Phthalans and Phenethylamines
Published on: January 3, 2018
Diradical dications of electron-enriched sulfur-bridged dihydrophenazine derivatives
Xiangjun Liu1, Deyi Fang1, Shusheng Wei1
1Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Molecular Sciences, Anhui Normal University, Wuhu, 241002, China. wenqingwang@ahnu.edu.cn.
Abstract:
Open-shell diradical dications based on a single dihydrophenazine unit remain entirely unexplored. Herein, we report the synthesis of two such species (12˙2+ and 22˙2+) along with their monoradical precursors (1˙+ and 2˙+) via weakly coordinating anion-stabilized chemical oxidation. Single-crystal X-ray diffraction of 22˙2+ reveals a roof-like conformation with sulfur-incorporated phenothiazine units. EPR spectroscopy confirms significant spin density delocalization, while SQUID magnetometry unveils an open-shell singlet ground state with antiferromagnetic coupling (J = -0.82 kcal mol-1). Notably, both diradical dications exhibit distinct near-infrared absorption around 1500 nm.
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