Synthesis, Spectroscopy and Magnetism of New -Thiocyanato Polynuclear Copper(II)-Chromium(III) Complexes

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

Abstrakty

EN

New heteropolynuclear complexes with general formula [Cu(diamine)2]3 [Cr(NCS)6]2źnH2O, where diamine = N,N-dimethylethylenediamine (1,2-dmen), N,N-dimethylethylenediamine (1,1-dmen), N,N-diethylethylenediamine (1,2-deen), N,N-diethylethylenediamine (1,1-deen), 1,3-diaminopropane (tn) were obtained by reactions of [Cr(NCS)6]3– with the corresponding cationic Cu(II) complexes: [Cu(diamine)2]2+ and characterized by spectroscopic methods and magnetic measurements. The formation of end-to-end thiocyanato bridges between tetragonal Cu(II) and pseudo-octahedral Cr(III) is evident from IR and UV-VIS spectra by appearance of new components of ni(CN) band and shifts in the absorption maxima assigned to copper d-d transitions in comparison with corresponding mononuclear complexes. The EPR spectra measured at room temperature on solid samples show broad, symmetric signal at g = 2.02–2.03.Variable-temperature magnetic susceptibility measurements reveal the presence of weak antiferromagnetic interactions in [Cu(1,1-deen)2]3[Cr(NCS)6]2H2O and [Cu(tn)2]3[Cr(NCS)6]22H2O.

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 11
• Strony: 1689--1694
• Opis fizyczny: Bibliogr. 27 poz., rys.

Twórcy

autor

Dobrzańska L.

autor

Wrzeszcz G.

autor

Grodzicki A.

autor

Rozpłoch F.

• Department of Chemistry, Gagarina 7, Nicholas Copernicus University, 87-100 Torun, Poland