Synthesis, crystal structure, hydrogen bonding and spectroscopy of Co³⁺, Mn³⁺ and Ni²⁺ oxalate complexes with the ligand (N,N′-bis(2-pyridylmethyl)-1,3-propanediamine)

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• 作者：Aminou Mohamadou ; Gerard A. van Albada ; Ilpo Mutikainen ; Urho Turpeinen ; Jan Reedijk
• 关键词：Transition metal ; Hydrogen bond ; Oxalate
• 刊名：Inorganica Chimica Acta
• 出版年：2010
• 出版时间：15 October 2010
• 年：2010
• 卷：363
• 期：12
• 页码：3023-3027
• 全文大小：609 K

文摘

Three new compounds are reported with the tetradentate ligand (N,N′-bis(2-Pyridylmethyl)-1,3-propanediamine) (abbreviated as pypn), two mononuclear compounds i.e. [Co(pypn)(C₂O₄)](ClO₄) (1), [Mn(pypn)(C₂O₄)](ClO₄) (2) and one dinuclear compound [Ni₂(pypn)₂(C₂O₄)](ClO₄)₂(C₂H₆O)_1/4(H₂O) (3). In the Co(III) and Mn(II) complexes the oxalate behaves as bidentate ligand, chelating the metal in the O,O′ mode, whereas in the Ni(II) compound the oxalate behaves as tetradentate ligand binding each Ni(II) ion by two oxygen atoms and bridging the two metallic centers.

The synthesis, X-ray crystal structure of all three compounds and their spectroscopic properties are presented in detail. The geometry around the Co³⁺, Mn³⁺, Ni²⁺ ions is essentially octahedrally based, while the stabilization of the crystal lattice in all cases is maintained by interesting hydrogen bond systems.