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

Wrzeszcz, G.; Dobrzańska, L.; Grodzicki, A.; Rozpłoch, F.

Artykuł - szczegóły

Tytuł artykułu

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.

Identyfikatory

Warianty tytułu

Języki publikacji

Abstrakty

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

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

Wydawca

Polskie Towarzystwo Chemiczne

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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Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BUJ1-0023-0074