CRYSTAL STRUCTURES OF COPPER(II) AND ZINC(II) COMPLEXES DERIVED FROM 3-(2-PYRIDYL)PYRAZOLE (330,00 руб.)

Complex 1 and 2 are both dinuclear structures which are further packed into a 1D supramolecular chain and a 3D supramolecular framework via weak C—H  O hydrogen bond interactions respectively. <...> The rational design and synthesis of metal-organic complexes have been attracting great interest in coordination and supramolecular chemistry because of their intricate structures and fascinating topologies as well as their potential applications as new functional materials [ 1—4]. <...> Intermolecular interactions, especially hydrogen bonding, have proven to be an interesting tool in supramolecular syntheses and manipulation of the final architecture [ 5 ]. <...> Among these ligands, the 3-(2-pyridyl)pyrazole ligand (HL) is a good choice to fabricate various metal-organic complexes due to the following characters. <...> Firstly, it shows an excellent coordination ability with several coordination modes and has been extensively used as a bidentate ligand, quite similar to 2,2™-bipyridyl or 1,10-phenanthroline, and the complexes exhibit various applications in the areas of catalysis, photophysics, information processing, and host-guest chemistry [ 12 ]. <...> Moreover, it acts as a tridentate chelate-bridging ligand after deprotonation of the pyrazolyl NH group and further coordination of the pyrazolyl N atom to another metal ion [ 13 ]. <...> Secondly, this type of ligands contains both pyrazolyl ring and larger conjugated ƒ system, capable of participating in the hydrogen bonding and ƒ—ƒ stacking interactions, especially in the aspect of packing multinuclear discrete subunits into a high-dimensional supramolecular framework [ 14 ]. <...> In the last decades, the combination of HL and metal salts has attracted great interest of researchers [15—17 ]. <...> Consequently, the colorless blockshaped crystals suitable for X-ray single crystal diffraction were obtained with a yield of 36.7 % (based on Zn(NO3)26H2O). <...> Finally, the blue block-shaped crystals suitable for X-ray single crystal diffraction were obtained with a yield of 32.7 % (based on Cu(NO3)23H2O). <...> Table 1 Crystal data and structure refinements for complexes 1 and 2 Complex 1 2 Empirical formula Formula weight T, K C16H16 Zn2N8O8 579.11 296(2) Wavelength, Е Crystal system Space group Unit cell dimensions: a, b, c, Е h, i, t, deg. <...> Complexes 1 <...>