Thermal Decomposition of New Mononuclear NiII Complexes with ONNO Type Reduced Schiff Bases and Pseudo Halogens |
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Authors: | B Meltem Ate? Bülent Zeybek Dr Mecit Aksu Ümit Ergun Filiz Ercan M Levent Aksu Orhan Atakol |
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Institution: | 1. Department of Physics Engineering, Hacettepe University, 06800 Beytepe, Ankara, Turkey;2. Department of Chemistry, Faculty of Science, Ankara University, 06100 Tando?an, Ankara, Turkey;3. Department of Chemistry, Faculty of Arts and Science, Bozok University, 66200, Yozgat, Turkey;4. Faculty of Gazi Education, Gazi University, 06500 Be?evler, Ankara, Turkey |
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Abstract: | Mononuclear nickel(II) complexes were prepared by reaction of the three ONNO type reduced Schiff bases bis‐N,N′‐(2‐hydroxybenzyl)‐1,3‐propanediamine (LHH2), bis‐N,N′‐(2‐hydroxybenzyl)‐2,2′‐dimethyl‐1,3‐propanediamine (LDMHH2), and bis‐N,N′‐1‐(2‐hydroxyphenyl)ethyl]‐1,3‐propanediamine (LACHH2) with NiII ions in the presence of pseudo halides (OCN–, SCN– and N3–). The complexes were characterized with the use of elemental analyses, IR spectroscopy, and thermal analyses. The molecular structure of one of the complexes was obtained by single‐crystal X‐ray diffraction. The obtained complexes are mononuclear, and a pseudo halide molecule is attached. One of the oxygen atoms of the ligand is in phenolate and the other was in phenol form. According to the thermogravimetry results, it was thought that the pseudo halide thermally detaches from the structure as hydropseudo halide. In azide‐containing complexes an endothermic reaction was observed although the azide group usually decomposes with an exothermic reaction. |
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Keywords: | Azides Nickel Pseudo halides Schiff bases Thermal analysis |
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