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Crystal and molecular structure of [MoO2(C17H11N3O2)]n (1) and [WO2(C17H11N3O2)]n (2)

The synthesis of supramolecular architectures based on metal complexes are continuing to be an interesting area of research. In most cases such complexes have some of the coordination sites occupied with strongly coordinated organic ligands, whereas the remaining coordination sites are either empty or only weakly occupied. The self-assembly reactions occured when acetylacetonate ligand from [MO2(acac)2] (M = Mo and W) was replaced with the H2NIH ligand (2-oxo-1-naphthaldehyde isonicotinylhydrazonato). New polymeric [MoO2(NIH)]n (1) and [WO2(NIH)]n (2) Zigzag products were obtained. Single crystal X-ray diffraction data sets for 1 were collected on the laboratory diffractometer Oxford Diffraction Xcalibur 3 with MoKα radiation. Reduction was performed by the CrysAlis software package.1 Solution, refinement and analysis of the structure was done using the programs integrated in the WinGX system.2 Laboratory X-ray powder diffraction data for 2 were collected on the X'Pert PRO MPD diffractometer, equipped with PiXcel detector and focusing X-ray mirror. The diffractometer was configured in a focusing foil-transmission gometry, using CuKα radiation. The sample was prepared as a thin powder layer deposited onto a Mylar foil. The crystal structure for 2 was solved using EXPO2009 program3 by simulated annealing and refinement of the structure model by subsequent Rietveld refinement.

structure; supramolecular architectures

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