頁籤選單縮合
題 名 | Structures and UV-Visible Absorption Properties of Unsymmetrical Bisdithiolene Nickel Complexes |
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作 者 | 王志傑; 吳韋菁; 李錦祥; 陳錦地; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 49:5 2002.10[民91.10] |
頁 次 | 頁805-811 |
分類號 | 336.5 |
關鍵詞 | Dithiolene; Bisdithiolene nickel complexes; X-ray diffraction; Solvatochromism; |
語 文 | 英文(English) |
英文摘要 | A new unsymmetrical bisdithiolene nickel complex Ni(Et□dazdt)(mnt) was synthesized and structurally characterized, where Et□dazdt and mnt denote 1,4-diethyl-perhydrodiazepine-2,3-dithione and maleoni-trildithiolate, respectively. Its crystal structure and absorption spectrum were determined and compared to those of Ni(Et□pipdt)(mnt), where Et□pipdt is 1,4-diethyl-piperazine-2,3-dithione. X-ray diffraction analysis reveals that the Ni(S□C□)□ moiety of Ni(Et□dazdt)(mnt) is not planar due to the twist conformation of a seven-member ring to Et□dazdt ligand. The twisting of Et□pipdt is less severe and NiS□ center of Ni(Et□pipdt)(mnt) possesses a closer to planar conformation than that of Ni(Et□dazdt)(mnt). Unlike Ni(Et□pipdt)(mnt), Ni(dazdt)(mnt) shows two major separated absorption bands in the visible and near-IR region, although both absorption bands show negative solvatochromism similar to that of Ni(Et□pipdt)(mnt). |
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