Synthesis, XAFS and X-ray structural studies of mono- and binuclear metal-chelates of N,O,O(N,O,S) tridentate Schiff base pyrazole derived ligandsстатья
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Аннотация:The syntheses of a series of novel N,O,O and N,O,S donor tridentate Schiff base ligands H2L1 and H2L2 via the condensation of 1-phenyl-3-methyl-4-formylpyrazol-5-ol(thiol) with 2-hydroxymethylaniline and their Co(II), Cu(II), Fe(III), and Mn(II) complexes are reported. The compounds are characterized by the C, H, N, S. metal elemental analysis, IR spectroscopy; H-1 NMR data for ligands, low-temperature magnetic measurements, X-ray absorption spectroscopy. The crystal structures for Ni(II) and Cu(II) coordination compounds with the compositions NiL21 and Cu2L21 are established by X-ray crystallography. (C) 2014 Elsevier B.V. All rights reserved.