A novel dimeric zinc(II) complex with a tripodal peptide ligand: A structure stabilized by ligand sharing

作者：Gao DZ; Li FH; Xu XH; Zhu SR; Lin HK^*

来源：Journal of Coordination Chemistry, 2004, 57(9): 755-761.

DOI：10.1080/00958970410001721358

• zinc(II) complex
• tripodal peptide ligand
• ligand sharing
• thermodynamic properties

The crystal structure of a novel dimeric zinc(II) complex, [ZnL(H2O)](2)(ClO4)(2)(.)4H(2)O (L = N-(bis(2-pyridyl)methyl)-2-pyridinecarboxamide), has been determined by X-ray diffraction. In this complex each planar N-py-N-amido-N-py moiety of the ligand coordinates to one zinc ion and the pendant pyridine of one [ZnL] unit completes the coordination sphere of a [ZnL] neighbor. Units of the complex are connected in a two-dimensional network by intermolecular hydrogen bonds. The thermodynamic properties of the ligand with bivalent metal ions Co(II), Ni(II), Cu(II) and Zn(II) were studied by potentiometric titration and the order of the stability constants is in agreement with the Irving Williams series. The dimeric complex is stabilized through ligand sharing, as confirmed by the crystal structure and thermodynamic properties.

• 出版日期2004-6-15
• 单位南开大学