Synthesis and Characterization of New Metal-Organic Frameworks Based on Tetracyanoplatinate(II) and N,N '-bis(2-hydroxyethyl)ethylenediamine: Single Crystal Structures of Zn-II and Cd-II Complexes Along with Magnetic Properties of Ni-II and Cu-II Complexes

Characterization and synthesis of novel cyano bridged coordination compounds [Ni(bishydeten)Pt(CN)(4)] (1), [Cu(bishydeten)Pt(CN)(4)] (2), [Zn(bishydeten)Pt(CN)(4)] (3), [Cd(bishydeten)Pt(CN)(4)] (4) [bishydeten = N,N'-bis(2-hydroxyethyl)ethylenediamine (C6H16N2O2)] were reported herein. The IR spectra of these coordination compounds verified the formation of aforementioned complexes. The ground state of the paramagnetic electron in the Cu-II located in tetragonal distorted octahedral sites (D (4h) ) was found to be d(x2-y2) for complex 2. As for complex 1, an EPR signal was not observed because of diamagnetic property of the Pt-II and momentary relaxation times of the Ni-II. All complexes followed identical decomposition mechanism in thermal analysis and thermal stabilities of complexes changed in the order of 1 > 4 > 3 > 2. Both 3 and 4 exhibit polymeric structure according to X-ray single structure analysis. While bishydeten coordinated with three donor atoms (N,N', and O) in complex 3, it acts as a bidentate ligand (N, and N') in complex 4. Magnetic properties of complexes 1-2 at 15-300 K temperature range were determined as antiferromagnetic with Weiss constants = -2.619 and -0.847 K respectively.