Syntheses and study on nickel(II) complexes with thiodiglycolic acid and nitrogen-donor ligands. X-ray structures of [Ni(bpy)(tdga)(H2O)]. 4H2O and [(en)Ni(mu-tdga)2Ni(en)].4H2O (tdgaH2=thiodiglycolic acid)
| Authors | |
|---|---|
| Year of publication | 2004 |
| Type | Article in Periodical |
| Magazine / Source | Polyhedron |
| MU Faculty or unit | |
| Citation | |
| Field | Inorganic chemistry |
| Keywords | Nickel(II); Thiodiglycolic acid complexes; X-ray structures; Magnetic properties |
| Description | Mixed-ligand Ni(II) complexes involving thiodiglycolate(2-) anion (tdga) and nitrogen-donor ligands in the coordination sphere have been prepared. The complexes of composition [Ni(bpy)(tdga)(H2O)].4H2O (1), [(en)Ni(-tdga)2Ni(en)].4H2O (2), [Ni(phen)(tdga)(H2O)] (3), [Ni(1,8-dan)(tdga)(H2O)] (4), [Ni(nphen)(tdga)(H2O)].H2O (5), [Ni(ampy)(tdga)(H2O)] (6), where BPY=2,2Ąä-bipyridine, EN=ethylenediamine, PHEN=1,10-phenanthroline, 1,8-dan=1,8-diaminonaphthalene, NPHEN=5-nitro-1,10-phenanthroline and AMPY=2-(aminomethyl)-pyridine, have been characterized by elemental analysis, IR and UV-Vis spectroscopies, and magnetic susceptibility measurements. Room temperature effective magnetic moments for 1-6 are ranging from 3.06 to 3.28 mu eff/mu B. and thus indicating that nickel atoms are six-coordinated in a deformed octahedral arrangement in all the prepared complexes. This conclusion has been confirmed by single-crystal X-ray analysis of [Ni(bpy)(tdga)(H2O)].4H2O (1). A binuclear structure of complex [(en)Ni(mu-tdga)2Ni(en)].4H2O (2) has been anticipated in connection with study of its magnetic properties over the 1.8-300 K temperature range (J=-4.35 cm-1, D=5.53 cm-1, zJ=-0.94 cm-1 for g=2.00) and unambiguously proved by a single-crystal X-ray analysis. |
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