研究生: |
簡思環 |
---|---|
論文名稱: |
十六族元素 (硒或碲) 混合六族元素 (鉻、鉬、鎢) 或銅 (I) 配位含氮異環碳烯 (NHC) 配位基之團簇化合物的合成、物性及化性探討 |
指導教授: |
謝明惠
Shieh, Ming-Huey |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 中文 |
論文頁數: | 246 |
中文關鍵詞: | 鉻 、钼 、鎢 、碲 、硒 、鐵 |
英文關鍵詞: | Cr, Mo, W, Te, Se, Fe |
論文種類: | 學術論文 |
相關次數: | 點閱:124 下載:0 |
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1. Te/M/CO (M = Cr、Mo 及 W) 系統之研究
以不同莫耳比例之 TeO2、Cr(CO)6 和 Et4NBr 於 1.5 M 鹼性 MeOH 溶液中加熱迴流 (superheating),可分別得化合物 [Te2Cr4(CO)18]2─ (1) 和 [Te7Cr6(CO)20]4─ (2)。反之,若此一鍋化合成於 1 M 鹼性 MeOH/MeCN 混合溶液及 45 oC 下反應,則形成化合物 [Te7Cr4(CO)14]4─ (3)。當改變主族來源,進一步混合 Te powder、M(CO)6 (M = Mo 和 W) 及Et4NBr 於 1 M 或 2 M 鹼性 MeOH/MeCN 混合溶液及 45 oC 下反應,亦獲得一系列新穎
金屬團簇物 [Te7Mo6(CO)20]4─ (4)、[Te6Mo6(CO)15]4─ (5)、[Te4W4(CO)14]4─ (6) 及 [Te6W5(CO)12]4─ (7)。此外,化合物 1 和 6 可藉由加入 TeO2/KOH 或置於加熱環境下,可分別擴核形成化合物 2 和 7。而化合物 4 與 Mo(CO)6/KOH 反應,則降解形成化合物 5。有趣的是,當化合物 7 與 I2 反應,可生成等電子結構 [Te6W5(CO)12]2─ (8)。其化合物之生成、結構轉換及相關性質亦藉由理論計算進一步驗證。
2. Se/Fe/CO/Cu/NHC 系統之研究
以一鍋化方式混合加入團簇物 [SeFe3(CO)9Cu2(MeCN)2] (1)、KOBut 和一系列咪唑啉鹽類 (1,3-dimethylimidazolium iodide (Me2Im•HI)、1,3-dimethylbenzimidazolium iodide (Me2BenzIm•HI)、1,3-diisopropylbenzimidazolium iodide (iPr2BenzIm•HI) 和 4,5-dichloro-1,3-dimethylimdazolium iodide (4,5-Cl2Me2Im•HI) 反應,分別得到化合物 [SeFe3(CO)9Cu2(Me2Im)2] (2)、[SeFe3(CO)9Cu2(Me2BenzIm)2] (3)、[SeFe3(CO)9Cu2(iPr2BenzIm)2] (4) 及 [SeFe3(CO)9Cu2(4,5-Cl2Me2Im)2] (5)。此外,於氧氣環境下化合物 1─5 可進行芳香環硼酸之耦合反應。其化合物之生成、催化反應及相關性質亦藉由理論計算進一步驗證。
Abstract
1. Te/M/CO (M = Cr, Mo, W) System
The reactions of appropriate ratios of TeO2, Cr(CO)6, and Et4NBr in superheated 1.5 M KOH/MeOH solutions led to the formation of clusters [Te2Cr4(CO)18]4─ (1) and [Te7Cr6(CO)20]4─ (2). Otherwise, a similar one-pot reaction in 1 M KOH/MeOH/MeCN solutions at 45 oC led to the formaton of cluster [Te7Cr4(CO)14]4─ (3). When the chalcogen’s source was changed to Te powder, a series of novel cluster anions [Te7Mo6(CO)20]4─ (4), [Te6Mo6(CO)15]4─ (5), [Te4W4(CO)14]4─ (6), and [Te6W5(CO)12]4─ (7) were obtained directly from the reactions of Te powder with M(CO)6/Et4NBr (M = Mo and W) in 1M or 2 M KOH/MeOH/MeCN solutions at 45 oC. When clusters 1 and 6 were treated with TeO2/KOH or in the heating conditions, the larger clusters 2 and 7 were produced. Cluster 4 could also be reconverted to cluster 5 by the addition of Mo(CO)6/KOH/MeOH/MeCN solutions. More interesting, when cluster 7 was reacted with I2, the isoelectronic cluster [Te6W5(CO)12]2─ (8) was formed. Furthermore, the nature, structural transformation, and electrochemical property of these resultant clusters are discussed and elucidated by DFT calculations.
2. Se/Fe/CO/Cu/NHC System
The one-pot reaction of cluster [SeFe(CO)9Cu2(MeCN)2] (1) with KOBut/imidazolium salts (1,3-dimethylimidazolium iodide (Me2Im•HI), 1,3-dimethylbenzimidazolium iodide (Me2BenzIm•HI), 1,3-diisopropylbenzimidazolium iodide (iPr2BenzIm•HI), and 4,5-dichloro-1,3-dimethylimidazolium iodide), a series of novel clusters [SeFe3(CO)9Cu2(Me2Im)2] (2), [SeFe3(CO)9Cu2(Me2BenzIm)2] (3), [SeFe3(CO)9Cu2(iPr2BenzIm)2] (4), [SeFe3(CO)9Cu2(4,5-dichloro-1,3-dimethylimidazolin-2-ylidene)2] (5) were formed, respectively. In addition, clusters 1─5 were able to mediate the dimerization of arylboronic acid under oxygen atmosphere. Furthermore, the nature, the catalysis, and electrochemical property of these resultant clusters are diacussed and elucidated by DFT calculations.
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