Syntheses, structures and magnetic properties of tetranuclear and trinuclear nickel(II) complexes with β-diketone-functionalized pyridinecarboxylate ligand

• Published in: Inorganica Chimica Acta 2010-10, Vol.363 (13), p.3238-3243
• Main Authors: Hui, Yuan-Yuan, Shu, Hui-Ming, Hu, Huai-Ming, Song, Juan, Yao, Hong-Liang, Yang, Xiao-Le, Wu, Qing-Ran, Yang, Meng-Lin, Xue, Gang-Lin
• Format: Article
• Language: English
• Subjects: Crystal structure; Magnetic property; Polynuclear nickel complex; β-Diketone-functionalized pyridinecarboxylate
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2010.06.002

The new β-diketone-functionalized pyridinecarboxylate ligand ( H 2 L) and its polynuclear nickel complexes, [Ni 4L 4(DMF)(H 2O) 3]·2.5DMF·3H 2O (1) and [Ni 3L 2(OAc) 2(DMF) 2 (H 2O) 2]·DMF·H 2O (2) have been synthesized characterized. Complex 1 has a [2 × 2] molecular grid structure and 2 is a trinuclear structure. The magnetic properties study of 1 and 2 revealed the intramolecular antiferromagnetic exchange coupling between the Ni(II) ions exists. The new β-diketone-functionalized pyridinecarboxylate ligand 2-(3-oxo-3-phenyl-propionyl)-6-pyridinecarboxylic acid ( H 2 L) has been synthesized and fully characterized. Its tetranuclear and trinuclear nickel(II) coordination compounds [Ni 4L 4(DMF)(H 2O) 3]·2.5DMF·3H 2O (1) and [Ni 3L 2(OAc) 2(DMF) 2 (H 2O) 2]·DMF·H 2O (2) have also been synthesized and characterized by single crystal X-ray diffraction. Compound 1 has a [2 × 2] molecular grid structure and 2 is a trinuclear structure. The magnetic properties study of 1 and 2 revealed the intramolecular antiferromagnetic exchange coupling between the Ni(II) ions exists.