Hydrothermal syntheses and structures of cobalt(II) and copper(II) coordination polymers with 1-tetrazole-phenyl-4-methylphosphonate ligands

作者：Smith Tiffany M; Zhang Y Z; Gooch Jonathan; Lau Adam; McLeish Sharde; Dunbar Kim R^*; Zubieta Jon^*

来源：Inorganica Chimica Acta, 2017, 458: 109-115.

DOI：10.1016/lica.2016.12.015

• Solid state coordination chemistry
• Metal-organophosphonate
• Mixed tetrazole/phosphonic acid ligand
• cobalt(II)-tetrazole-phosphonate chain
• copper(II)-tetrazolate-phosphonate network

Hydrothermal reactions of copper(II) and cobalt(II) salts with 1-tetrazole-phenyl-4-methylphosphonic acid yielded the coordination polymers [Cu(H2O)(HO3PCH2C6H4CN4)center dot H2O (1 center dot H2O) and [Co (H2O)(2)(HO3PCH2C6H4CN4H)(2)]center dot 2H(2)O (2.2H(2)O). Compound 14-120 is two dimensional and is constructed from chains of trans -corner sharing, '4+2' axially distorted (CuO4N2) octahedra. These chains are linked through the organic tethers of the ligands in the doubly deprotonated form{HO3PCH2C6H4CN4}(2-) to propagate in two -dimensions. In contrast, compound 2 center dot 2H(2)O is one-dimensional and features (CoO4N2} octahedra linked through pairs of ligands in the singly deprotonated form (HO3PCH2C6H4CN4H}(-1), i.e. with the tetrazole terminus in the neutral form. The magnetic properties of compound1 center dot H2O reflect the structure where the Cu(II) ions are bridged by syn-syn phosphate and tetrazolate Cu -N -N -Cu bridges, with the former linkage likely to transfer ferromagnetic coupling whereas the latter leads to antiferromagnetic coupling. The two competing pathways lead to negligible overall coupling.

• 出版日期2017-3-24