Heterogeneous reactions of solid nickel(II) complexes XXIII |
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| Authors: | E Jóna M Jamnický I Kostelný |
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| Institution: | (1) Department of Inorganic Chemistry, Slovak Technical University, 812 37 Bratislava, Czechoslovakia |
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| Abstract: | The thermal decompositions of the following compounds were studied: Ni(NCO)2(3-Etpy)4. (I), Ni(NCO)2(3-Clpy)4 (II), Ni(NCO)2(3-Brpy)4 (III), Ni(NCO)2(3-NH2py)4 (IV), Ni(NCO)2(3-Clpy)2·2H2O (V) and Ni(NCO)2(3-Brpy)2·2H2O (VI). The release of volatile ligands (3-Rpy and H2O) is a two-step process, Ni(NCO)2(3-Etpy)2 (VII), Ni(NCO)2(3-Clpy)2 (VIII), Ni(NCO)2(3-Brpy)2 (IX) and Ni(NCO)2(3-NH2py)2 (X) being formed as intermediate complexes. The loss of the last molecules of volatile 3-Rpy ligands is accompanied by NCO ligand decomposition. The spectral and magnetic data indicated pseudooctahedral configuration for all complexes I-X.
Zusammenfassung Die thermische Zersetzung der folgenden Verbindungen wurde untersucht: Ni(NCO)2(3-Etpy)4 (I), Ni(NCO)2(3-Clpy)4 (II), Ni(NCO)2(3-Brpy)4 (III), Ni(NCO)2(3-NH2py)4 (IV), Ni(NCO)2(3-Clpy)2·2H2O (V) und Ni(NCO)2(3-Brpy)2·2H2O (VI). Die flüchtigen Liganden (3-Rpy und H2O) werden in zwei Schritten abgegeben, wobei Ni(NCO)2(3-Etpy)2 (VII), Ni(NCO)2(3-Clpy)2 (VIII), Ni(NCO)2(3-Brpy)2 (IX) und Ni(NCO)2(3-NH2py)2 (X) als intermediäre Komplexe gebildet werden. Die Abgabe der letzten Moleküle der flüchtigen 3-Rpy-Liganden geht mit der Zersetzung des NCO-Liganden einher. Die spektrometrischen und magnetischen Daten weisen auf eine pseudooktaedrische Konfiguration aller Komplexe (I-X) hin.
                      : Ni(NCO)2(3-Etpy)4 (I), Ni(NCO)2(3-Clpy)4 (II), Ni(NCO)2(3-Brpy)4 (III), Ni(NCO)2(3-NH2py)4 (IV), Ni(NCO)2(3Clpy)2·2H2O(V) Ni(NCO)2(3-Brpy)2·2H2O (VI).     (3-Rpy H2O)    ,  Ni(NCO)2(3-Etpy)2 (VII), Ni(NCO)2(3-Clpy)2 (VIII), Ni(NCO)2(3-Brpy)2 (IX) Ni(NCO)2(3NH2py)2 (X).   .    .
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