Synthesis and Characterization of New Thiocyanato Bridged Heterobimetallic Complexes with the General formula: [Cu(diamine)2]3[Cr(NCS)6]2.nH2O

• Autorzy: Wrzeszcz G.
• Języki publikacji: EN

Abstrakty

EN

Four new thiocyanato bridged heteropolynuclear complexes with general formula [Cu(diamine)2]3[Cr(NCS)6]2_nH2O, where diamine = N-ethylethylenediamine (N-Et-en), N-isopropylethylenediamine (N-Pri-en), N-methyl-1,3-propanediamine (N-Me-tn), 1,3-diaminopentane (C-Et-tn), were prepared by treatment of corresponding cationic [Cu(diamine)2]2+ complex with [Cr(NCS)6]3-in aqueous solutions. Solid products were formulated as [Cu(N-Et-en)2]3[Cr(NCS)6]2, [Cu(N-Pri-en)2]3[Cr(NCS)6]2_2H2O, [Cu(N-Me-tn)2]3[Cr(NCS)6]2_H2O and [Cu(C-Et-tn)2]3[Cr(NCS)6]2_H2O and characterized by spectroscopic methods, magnetic measurements and thermal analysis. The formation of end-to-end thiocyanato bridges between tetragonal Cu(II) and octahedral Cr(III) is evident from IR and electronic spectra. The EPR spectra measured at room temperature on solid samples show broad, symmetric signal at g = 2.01-2.03. Variable-temperature magnetic susceptibility measurements reveal the presence of weak antiferromagnetic interactions in [Cu(N-Pri-en)2]3[Cr(NCS)6]2_2H2O and [Cu(C-Et-tn)2]3[Cr(NCS)6]2_H2O. Thermal decomposition after dehydration is multistage and yields CuO and CuCrO2 as final products.

Słowa kluczowe

EN

chromium(III); copper(II); diamine; EPR; heterobinuclear complexes; thiocyanato bridges

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 7
• Strony: 845--854
• Opis fizyczny: Bibliogr. 48 poz., rys.

Twórcy

autor

Wrzeszcz G.

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

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