Cyano-complexes and salts with tetracyanonickellateII and N,N-bis(2-hydroxyethyl)-ethylenediamine: synthesis,IR spectra,magnetic properties,thermal analyses,and crystal structures |
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| Abstract: | Four cyano complexes, [Ni(N-bishydeten)Ni(CN)4] n (c1), [Cu(N-bishydeten)2][Ni(CN)4] (c2), [Zn2(N-bishydeten)2Ni(CN)4] n (c3), and [Cd(N-bishydeten)2][Ni(CN)4] (c4), have been synthesized and characterized by FT-IR, elemental, and thermal analyses. The structures of c2 and c4 were determined by single-crystal X-ray diffraction studies; both structures contain isolated cations and anions. The c2 consists of [Cu(N-bishydeten)2]2+ with octahedrally coordinated CuII and diamagnetic [Ni(CN)4]2–, but c4 consists of [Cd(N-bishydeten)2]2+, in which CdII is eight coordinate with two tetradentate N-bishydeten and diamagnetic [Ni(CN)4]2–. The value of the shape measure S (o) indicates that the coordination geometry around CdII lies along D 2d [dodecahedron; (dd)], C 2v [bicapped trigonal prism; (btp)], and D 4d [square antiprism; (sap)] but close to D 2d and D 4d. Variable temperature magnetic susceptibility measurements of c1 and c2 show the presence of little antiferromagnetic interaction below 20?K. Thermal analyses reveal that first neutral N-bishydeten and then cyano ligands were liberated from the complexes. |
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| Keywords: | TetracyanonickellateII Bimetallic complexes N,N-Bis(2-hydroxyethyl)-ethylenediamine Eight-coordination Thermal analysis Magnetic properties |
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