Spectral and magnetic behaviour of some nickel(II) and cobalt(II) complexes of triazene 1-oxides |
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| Affiliation: | 1. Department of Chemical and Biological Sciences, Faculty of Science, Japan Women′s University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan;2. Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan;3. Comprehensive Analysis Center for Science, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan;1. Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, Lodz 90-924, Poland;2. Rigaku Europe SE, Hugenottenallee 167, Neu-Isenburg 63263, Germany;3. Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 107 Gen. Hallera Ave., Gdańsk 80-416, Poland;4. Independent Medical Biology Unit, Faculty of Pharmacy, Medical University of Lublin, Jaczewskiego 8b, Lublin 20-093, Poland;5. Department of Toxicology, Faculty of Pharmacy, Medical University of Lublin, Chodźki 8, Lublin 20-093, Poland;6. Department of Pharmaceutical Microbiology, Medical University of Lublin, Lublin 20-093, Poland;1. Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland;2. Independent Medical Biology Unit, Medical University of Lublin, Jaczewskiego 8b, 20-093 Lublin, Poland;3. Department of Toxicology, Medical University of Lublin, Chodzki 8b, 20-093 Lublin, Poland;4. Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warszawa, Poland |
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| Abstract: | Some new nickel(II) and cobalt(II) complexes of triazene 1-oxides derived from amino pyridines are reported. Experimental evidence shows that the nickel(II) complexes are planar in the solid state but exhibit a planar⇋pseudooctahedral equilibrium. The pseudooctahedral species for the (RPyCl)2Ni complexes involves chloro coordination. In chloroform solution the equilibrium shifts substantially to the right compared to benzene solution for these complexes. In the corresponding cobalt(II) complexes, the chloro-coordination is complete and the complexes have a distorted octahedral symmetry in both solid and solution phases. |
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