A novel nitronyl nitroxide radical containing thiophene and pyridine rings and its manganese(II) complex: synthesis, structure, and magnetic properties. Issue 11 (3rd June 2017)

• Record Type: Journal Article
• Authors: Guo, Jian-Ni; Wang, Juan-Juan; Sun, Gui-Fang; Li, Hong-Dao; Li, Li-Cun
• Is Part Of: Journal of coordination chemistry. Volume 70:Issue 11(2017)
• Page Start: 1926
• Page End: 1935
• Publication Date: 2017-06-03
• Subjects: Nitronyl nitroxide radical -- thiophene ring -- Mn(II) -- magnetic properties -- crystal structure; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2017.1318208
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: A novel nitronyl nitroxide NIT-thien-3-Py (2-(3-( m -pyridyl)-2-thienyl)-4, 4, 5, 5-tetramethylimidazoline-1-oxyl-3-oxide) and its Mn(II) complex [Mn(hfac)2 (NIT-thien-3-Py)]2 (hfac = hexafluoroacetylacetonate) have been obtained. X-ray analysis indicates that the Mn(II) complex possesses a cyclic dimer structure in which two radical ligands link two Mn(II) ions through their NO groups and pyridine rings. The study of the magnetic data indicates that the manganese(II) ion strongly and antiferromagnetically interacts with the directly bonding NO group and there is weak ferromagnetic coupling between two Mn–NO pairs through the thiophene and pyridine rings of the radical ligand in agreement with a spin polarization mechanism. Abstract :