Di- and tetranuclear heterometallic 3d–4f cobalt(II)–lanthanide(III) complexes derived from a hexadentate bisoxime: Syntheses, structures and magnetic properties. (5th September 2016)

• Record Type: Journal Article
• Authors: Dong, Wen-Kui; Ma, Jian-Chun; Dong, Yin-Juan; Zhu, Li-Chun; Zhang, Yang
• Is Part Of: Polyhedron. Volume 115(2016)
• Page Start: 228
• Page End: 235
• Publication Date: 2016-09-05
• Subjects: Hexadentate bisoxime ligand -- 3d–4f complex -- Synthesis -- Crystal structure -- Magnetic property; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2016.05.017
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Five heterometallic 3d–4f Co(II)–Ln(III) complexes, [CoLLa(Py)(NO3 )3 (CH3 OH)] (1 ), [Co2 L2 La2 (4, 4′-bipy)(NO3 )6 (CH3 OH)2 ] (2 ) and [CoLLn(OAc)(NO3 )2 (CH3 OH)] (Ln = Gd (3 ), Tb (4 ), Dy (5 )), derived from a hexadentate bisoxime. Moreover, magnetic measurements were performed on the complexes3, 4 and5 . Abstract: Five heterometallic Co(II)–Ln(III) complexes, a discrete heterodinuclear complex [CoLLa(Py)(NO3 )3 (CH3 OH)] (1 ) (Py = pyridine), a heterotetranuclear dimer [Co2 L2 La2 (4, 4′-bipy)(NO3 )6 (CH3 OH)2 ] (2 ) (4, 4′-bipy = 4, 4′-bipyridine) and three discrete heterodinuclear complexes [CoLLn(OAc)(NO3 )2 (CH3 OH)] (Ln = Gd (3 ), Tb (4 ), Dy (5 )), were synthesized with a hexadentate bisoxime ligand 1, 2-bis(3-methoxysalicylideneaminooxy)ethane (H2 L), and characterized by single crystal X-ray diffraction. The complexes1, 3, 4 and5 are discrete heterodinuclear structures, but the assembly of two dinuclear units [CoLLa(NO3 )3 (CH3 OH)] and one 4, 4′-bipyridine results in a discrete heterotetranuclear dimer2 . The Co(II) and La(III) atoms in the complexes1 and2 are penta- and decacoordinated, while the Co(II) and Ln(III) (Ln = Gd, Tb and Dy) atoms in the complexes3, 4 and5 are hexa- and nonacoordinated, respectively. Magnetic measurements were performed on the complexes3, 4 and5, where an intramolecular ferromagnetic interaction is found in the complex3 .