Abstract
Two new 2-dimensional cyanide-bridged coordination polymers [Zn(H$_{2}$O)$_{2}$Ni(CN)$_{4}$ 6(H$_{2}$O) and Zn(H$_{2}$O)$_{2}$ Ni(CN)$_{4}$ 3(C$_{4}$H$_{8}$O$_{2})$], which were similar to Hofmann-type clathrates, were synthesized based on [Ni(CN)$_{4}$]$^{2-}$ and Zn$^{2+}$ as building blocks. These substances were synthesized as compounds in crystalline form. Thes tructures of the crystalline compounds were characterized via their spectral analyses. General information about the structures of the newly obtained Hofmann-type clathrates was obtained from their vibration spectra by considering significant changes in the vibration peaks of the cyanide group, water ligand molecule, and guest molecules (water and 1,4-dioxane). The thermal behavior of the Hofmann-type clathrates was investigated in the range of 25-500 $^{\circ}$ C. In addition, experimental data on the magnetic properties of the Hofmann-type clathrates were obtained using the Gouy method under normal conditions. Information on the properties of the structures of the Hofmann clathrates was obtained by applying the single crystal diffraction technique. The asymmetric unit of the first Hofmann-type clathrate contained 1 Zn(II) ion, 1 Ni(II) ion, 1 cyanide ligand, 1 water ligand molecule, and 2 guest water molecules. The asymmetric unit of the second Hofmann-type clathrate contained 1 Zn(II) ion, 1 Ni(II) ion, 2 cyanide ligands, 1 water ligand molecule, and 2 half guest 1,4-dioxane molecules.
Highlights
There are many important chemical groups in organic chemistry
When the vibrations of the free liquid phase D were compared with the vibrations of the guest D molecule in crystal 2, they showed a large variation relative to each other. This was probably due to the interactions between the vibrations of the guest D molecule and the vibrations of the H 2 O ligand molecule, and the hydrogen bond formed between the guest D molecule and the ligand water molecule. These results indicated that the interactions between the host structure Zn(H 2 O) 2 Ni(CN) 4 and the guest (D) molecule, which formed crystal 2, were strong
In this study, 2 new Hofmann-type Zn(H 2 O) 2 Ni(CN) 4 6(H 2 O) and Zn(H 2 O) 2 Ni(CN) 4 3(C 4 H 8 O 2) clathrates were successfully synthesized in crystal form
Summary
There are many important chemical groups in organic chemistry. The cyanide group is one of these important chemical groups and is represented by the formula C ≡N. The Ni(CN) 4 group is an important group in terms of both chemical and physical properties formed by binding of the Ni atom to the carbon atom of the cyanide structure. Some of these compounds are 1-dimensional (1D), some are 2D, and some are 3D. Hofmann-type compounds are among the most important compounds synthesized based on the potassium-Ni cyanide compound
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