Synthesis and Characterization of New Thiocyanato Bridged Complexes with the General Formula [MLn}3[Cr(NCS)6]2.mH2O, where M=Cu(II), Ni(II), Co(II); L=Various Substituted Imidazoles

• Autorzy: Wrzeszcz, G. , Dobrzańska, L. , Grodzicki, A. , Rozpłoch, F.
• Języki publikacji: EN

Abstrakty

EN

New thiocyanato bridged complexes of the type [CuL4]3[Cr(NCS)6]2_mH2O [L = 1-methylimidazole (1-Meim), 2-methylimidazole (2-Meim), 1,2-dimethylimidazole (1,2- Me2im)] and [M(1-Meim)6]n[{M(1-Meim)4Cr(NCS)6}2n]_mH2O (M = Ni(II), Co(II) were prepared by the reaction of [Cr(NCS)6]3- with the appropriate [MLn]2+ complex in an aqueous solution and characterized by elemental and thermal analysis, IR, UV-VIS, EPR and temperature variable magnetic susceptibility. The presence of NCS bridges between M(II)-Cr(III) centres is evident from IR spectra. The electronic spectra correlate with proposal of different composition of Cu3Cr2 and M3Cr2(M = Ni, Co) systems. The parameters determined from temperature dependence on magnetic susceptibility (80-300 K) indicate weak or negligible antiferromagnetic interaction for obtained Cu(II)-Cr(III), Ni(II)-Cr(III) and Co(II)-Cr(III) systems. Thermal decomposition after dehydration is multistage and yields CuO + CuCrO2 and MIIO+MIICr2O4 as final products, respectively.

Słowa kluczowe

EN

heteropolynuclear complexes; thiocyanato bridges; chromium(III); copper(II); nickel(II); cobalt(II); imidazole; magnetic properties; EPR; IR; electronic spectra; thermal analysis

• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 2
• Strony: 147-156
• Opis fizyczny: Bibliogr. 36 poz., rys.

Twórcy

autor

Wrzeszcz, G.

• Faculty of Chemistry, Gagarina 7, Nicolaus Copernicus University, 87-100 Toruń, Poland

autor

Dobrzańska, L.

• Faculty of Chemistry, Gagarina 7, Nicolaus Copernicus University, 87-100 Toruń, Poland

autor

Grodzicki, A.

• Faculty of Chemistry, Gagarina 7, Nicolaus Copernicus University, 87-100 Toruń, Poland

autor

Rozpłoch, F.

• Institute of Physics, Grudziądzka 5/7, Nicolaus Copernicus University, 87-100 Toruń, Poland

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