A Spontaneous Magnetic Moment in an Organic Radical: Synthesis and Characterization of Benzodioxepinyl-1,3,2-dithiazolyl
Leckie, Dominique ; Harb, Mohamad ; Mroz, Natalia ; Wrixon, Justin D. ; Campo, Javier ; Arauzo, Ana (Universidad de Zaragoza) ; Bakhshi, Hamed ; Pilkington, Melanie ; Rawson, Jeremy M.
Resumen: The synthesis of the 1,3,2-dithiazolyl radical (1) derived from 3,4-dihydro-2H-1,5-benzodioxepine is described. Crystals of 1 were grown by vacuum sublimation and adopt the orthorhombic space group Pbca. DC SQUID magnetometry reveals Curie–Weiss behavior for T > 20 K (C = 0.376 emu K mol–1 and θ = +5.7 K) consistent with local ferromagnetic interactions. The presence of weaker antiferromagnetic interactions led to magnetic ordering as a canted antiferromagnet (TN = 3.8 K) with a small spontaneous moment (2.5 × 10–4 Nβ) and a small coercivity (ca. 8 Oe) at 2 K. Magnetic ordering was reflected in a field dependence of the magnetic susceptibility below 3.8 K and a peak in the low temperature heat capacity data. A canting angle of 0.08° was estimated from M vs H data.
Idioma: Inglés
DOI: 10.1021/jacs.4c09796
Año: 2024
Publicado en: Journal of the American Chemical Society 146, 46 (2024), 31371–31376
ISSN: 0002-7863
Tipo y forma: Article (PostPrint)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.
Fecha de embargo : 2025-11-07
Exportado de SIDERAL (2024-11-22-11:52:39)
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Idioma: Inglés
DOI: 10.1021/jacs.4c09796
Año: 2024
Publicado en: Journal of the American Chemical Society 146, 46 (2024), 31371–31376
ISSN: 0002-7863
Tipo y forma: Article (PostPrint)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material. Fecha de embargo : 2025-11-07
Exportado de SIDERAL (2024-11-22-11:52:39)
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Record created 2024-11-22, last modified 2024-11-22