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題名 | Silver(Ⅰ) Complexes of Schiff Bases Derived from Thiophene-2,5-Dicarboxaldehyde and Furan-2,5-Dicarboxaldehyde= |
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作者 | 黃文樞; 王東亮; 許甥欽; 劉陵崗; Hwang, Wen-shu; Wang, Dong-liang; Hsu, Sen-t'sing; Liu, Ling-kang; |
期刊 | Journal of the Chinese Chemical Society |
出版日期 | 19980400 |
卷期 | 45:2 1998.04[民87.04] |
頁次 | 頁269-275 |
分類號 | 340 |
語文 | eng |
關鍵詞 | Thiophene-2,5-dicarboxaldehyde; Furan-2,5-dicarboxaldehyde; 2-thienylmethylamine; 2-furanmethylamine; Silver Ⅰ complexes of schiff base; |
英文摘要 | The reactions of Schiff bases, derived by the condensation of thiophene-2,5-dicarbaldehyde and furan2,5-dicarbaldehyde with 2-thienylmethylamine or 2-furanmethylamine, with silver nitrate have been studied in refluxing anhydrous methanol under nitrogen atmosphere. Complexes thus fonned have been isolated and characterized by elemental analysis, electrical conductance, cyclic voltammetry, and □H NMR, □C NMR, IR, UV-Vis, and mass spectroscopic studies. The experimental results reveal that the complexes are primarily ionic in nature, consisting of (L)□Ag□ dication and Ag(NO□)□ negatively charged dianions. The molecular structure of one of the complexes, [((C□H□O)CH□N=CH(C□H□S)CH=NCH□(C□H□O))□Ag□] [Ag(N□) □] has been studied in the solid state. The complex is crystallized in the triclinic space group P□ with a = 12.889(7) □, b = 14.884(5) □, c = 15.084(6) □, α= 92.18(4) °, = 79.78(4)°, γ= 110.92(4)°. The structure is disordered. Each Ag in dication is tri-coordinated by three azomethine N atoms from three ligands, and each ligand employs two azomethine N atoms to coordinate to two Ag ions such that the geometry around the Ag... Ag axis conforms to a propeller-shape. The two Ag ions are between the two N□ planes with Ag...Ag distance ca. 4.81□. There is no bonding between any Ag ion and any thiophene of the three ligands. However, two Ag ions and three thiophene S atoms form a trigonal bipyramidal geometry. |
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