作者:Jinfeng Chu、Wei Chen、Guangxun Su、Yu-Fei Song
DOI:10.1016/j.ica.2011.06.041
日期:2011.10
In this paper, two di-substituted triazine-based ligands, 6-chloro-N,N,N'N'-tetrakis-pyridin-2-ylmethyl-[1,3,5] triazine-2,4-diamine (L1), and 6-chloro-N,N'-bis-pyridin-2-ylmethyl-N,N'-bis-thiophen-2-ylmethyl-[1,3,5] triazine-2,4-diamine (L2), have been prepared. Reaction of CuCl2 center dot 2H(2)O and Cu(NO3)(2)center dot 3H(2)O with L1 and L2 results in the formation of [Cu2Cl4(L1)]center dot 3MeOH (compound 1), [Cu-4(NO3)(8)(L1)(2)]center dot 2.07CH(2)Cl(2)center dot 0.93MeOH (compound 2), [Cu2Cl4(L2)(2)] (compound 3) and [Cu(NO3)(2)(L2)]center dot CH2Cl2 (compound 4), respectively, which have been fully characterized and determined by single-crystal X-ray crystallography, FT-IR, elemental analysis, thermogravimetric measurement and magnetic susceptibility. The dinuclear compound 1 shows strong pi-pi interactions between the neighboring pyridine rings. The nitrate-p (1,3,5-triazine ring) interaction with the distance of 2.755 angstrom in compound 2, is the closest contact reported so far. Compounds 3 and 4 are mononuclear copper(II) compounds, in which none of thiophene rings coordinates with copper(II) ion. In addition, the different orientations of two thiophene rings in compounds 3 and 4 lead to the pi-pi and CH2Cl2-pi (thiophene ring) interactions in compound 4, but not in compound 3. (C) 2011 Elsevier B. V. All rights reserved.