科研之友
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摘要
Three new silver(I) complexes existing Ag-Ag interactions, a trinuclear cluster complex [Ag-3(L-1)(2)(NO3)(2)](NO3) 1, a dinuclear complex [Ag-2(L-1)(2)](PF6)(2) 2 and a one-dimensional chain complex [Ag-2 L-2(NO3)(2)](infinity) 3, where L-1 and L-2 are two structurally related pyridyl dithioether ligands, bis(2-pyridylthio) methane (L-1) and 1,3-bis(2-pyridylthio)-propane (L-2), have been synthesized and their structures were determined by single-crystal X-ray diffraction analysis. The striking structural differences of 1 and 2 suggest that counter anions have a profound effect upon the framework formations of silver complexes with pyridyl dithioether ligands, and the differences of 1 and 3 indicate that the subtle changes of the space groups have great influence on the coordination modes of the terminal pyridylsulfanyl groups and the geometries of Ag-I ion and therefore greatly influence the structures of their complexes. The weak Ag...O interactions in the trinuclear complex 1 and the one-dimensinoal chain complex 3 extend them into quasi two-dimensional networks, and the Ag...S weak interactions in the dinuclear complex 2 into one-dimensinoal chains, and such weak interactions further stabilized these complexes.
- 出版日期2003-12
- 单位南开大学
