Mononuclear and polynuclear halide and nitrate Cu(II) compounds with 1,4,5-triazanaphthalene as a ligand: Characterization, magnetism and X-ray structures was written by van Albada, Gerard A.;van der Horst, Maarten G.;Fu, Wen Tian;Roubeau, Olivier;Mutikainen, Ilpo;Turpeinen, Urho;Reedijk, Jan. And the article was included in Inorganica Chimica Acta in 2009.Recommanded Product: Pyrido[2,3-b]pyrazine This article mentions the following:
Using the ligand 1,4,5-triazanaphthalene (abbreviated as tan) in reaction with Cu(II) salts, three mononuclear compounds, Cu(tan)2Cl2 (1), Cu(tan)2Br2 (3), Cu(tan)2(NO3)2 (5) and three polynuclear compounds, [Cu(tan)Cl2]n (2), [Cu(tan)Br2]n (4), [Cu(tan)(NO3)2]n (6) were prepared and characterized by UV-visible, EPR, FTIR and Far-FTIR spectroscopies. The crystal structures of compounds 1, 3, 5 and 6 are reported, as well as that of the dioxane adduct of compound 4, [Cu(tan)Br2(C4H8O2)](C4H8O2) (4A). The structure of 2 was solved by x-ray powder diffraction. The coordination geometry around the Cu(II) atoms is tetrahedral for (1) and (3), square-pyramidal for (4A) and distorted octahedral for (5) and (6). Magnetic susceptibility measurements on the polynuclear compounds revealed weak antiferromagnetic interactions between the Cu(II) atoms with interaction constants (J) of J = -9.1 and -10.5 cm-1, for 4 and 6, resp. For compound 2 two options for possible interactions were considered, with interaction constants which vary for J rung -22.0 to -13.5 cm-1 and J rail -19.6 to -17.0 cm-1. These figures are discussed in the light of relevant structural parameters and literature. In the experiment, the researchers used many compounds, for example, Pyrido[2,3-b]pyrazine (cas: 322-46-3Recommanded Product: Pyrido[2,3-b]pyrazine).
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