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Thermal Decomposition of New Mononuclear Ni II Complexes with ONNO Type Reduced Schiff Bases and Pseudo Halogens
Author(s) -
Ateş B. Meltem,
Zeybek Bülent,
Aksu Mecit,
Ergun Ümit,
Ercan Filiz,
Aksu M. Levent,
Atakol Orhan
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900499
Subject(s) - chemistry , halide , azide , thermal decomposition , schiff base , halogen , nickel , ligand (biochemistry) , molecule , crystal structure , medicinal chemistry , inorganic chemistry , crystallography , polymer chemistry , organic chemistry , biochemistry , alkyl , receptor
Mononuclear nickel(II) complexes were prepared by reaction of the three ONNO type reduced Schiff bases bis‐ N , N ′‐(2‐hydroxybenzyl)‐1,3‐propanediamine (L H H 2 ), bis‐ N , N ′‐(2‐hydroxybenzyl)‐2,2′‐dimethyl‐1,3‐propanediamine (LDM H H 2 ), and bis‐ N , N ′‐[1‐(2‐hydroxyphenyl)ethyl]‐1,3‐propanediamine (LAC H H 2 ) with Ni II ions in the presence of pseudo halides (OCN – , SCN – and N 3 – ). 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.