Zn and Cu-Based Coordination Polymers and Metal Organic Frameworks by the of Use of 2-Pyridyl Oximes and 1,3,5-Benzenetricarboxylic Acid.

The simultaneous use of 2-pyridyl oximes (pyridine-2 amidoxime, Hpyaox; 2-methyl pyridyl ketoxime, Hmpko) and 1,3,5-benzenetricarboxylic acid (Hbtc) provided access to five new compounds, namely [Zn(Hbtc)(Hpyaox)]•2HO (•2HO), [Zn(Hbtc)(Hpyaox)] (), [Cu(Hbtc)(Hpyaox)] (), [Cu(Hbtc)(HmpKo)] () and [Cu(Hbtc)(Hmpko)(HO)]•4HO (•4HO). Among them, is the first example of a metal-organic framework (MOF) containing Hpyaox. Its framework can be described as a 3-c uninodal net of topology with the layers being parallel to the (1,0,1) plane. Furthermore, is the third reported MOF based on a 2-pyridyl oxime in general. and are new members of a small family of coordination polymers containing an oximic ligand. form 3D networks through strong intermolecular interactions. Dc magnetic susceptibility studies were carried out in a crystalline sample of and revealed the presence of weak exchange interactions between the metal centres; the experimental data were fitted to a theoretical model with the fitting parameters being = -0.16(1) cm and = 2.085(1). The isotropic value was also confirmed by electronic paramagnetic resonance (EPR) spectroscopy. Reactivity studies were performed for in the presence of metal ions; the reaction progress was studied and discussed for Fe(NO) by the use of several characterization techniques, including single crystal X-ray crystallography and IR spectroscopy.