CRYSTAL STRUCTURES OF COPPER(II) AND ZINC(II) COMPLEXES DERIVED FROM 3-(2-PYRIDYL)PYRAZOLE

copper(II) crystal structure 3-(2-pyridyl)pyrazole zinc(II).

ЭЛЕКТРОННАЯ СТРУКТУРА И ХИМИЧЕСКАЯ СВЯЗЬ В КРИСТАЛЛАХ KN3 И KSCN, ИССЛЕДОВАНИЕ СТРУКТУРНЫХ ОСОБЕННОСТЕЙ НЕСТЕХИОМЕТРИЧЕСКИХ SrCo0,8–Fe0,2WO^ (0 < х< 0,1) ПЕРОВСКИТОВ, ...

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 ]. <...> Nevertheless, it is still tremendously difficult and long-term challenge to construct target complexes with expected structures and properties due to the fact that many other factors, including organic ligands, temperatures, pH values, template, solvents, counter ions and crystallization methods, play significant roles in the self-assembly process [ 6—9]. <...> The selection of appropriate organic ligands is very pivotal for obtaining target complexes with intriguing structures and properties [ 10, 11 ]. <...> 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 system, capable of participating in the hydrogen bonding and — stacking interactions, especially in the aspect of packing multinuclear discrete subunits into a high-dimensional supramolecular framework [ 14 ]. <...> Complexes 1 and 2 were prepared by the reaction of copper(II)/zinc(II) salt, HL ligand in the 1:1 molar ratio in the water/alcohol system. <...> The results of elemental analyses for the two complexes were in good agreement with the theoretical requirements of their compositions (X-ray analysis results). 4,4-dibromobiphenyl was added into the reaction system <...>

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