研究生: |
周琬芳 Chou, Wan-Fang |
---|---|
論文名稱: |
雙鉬多重鍵與有機腈類反應之研究 Reactivity Study Between the Mo-Mo Multiply Bonded Complexes and Organic Nitriles |
指導教授: |
蔡易州
Tsai, Yi-Chou |
口試委員: |
劉瑞雄
Liu, Rai-Shung 莊士卿 Chuang, Shih-Ching |
學位類別: |
碩士 Master |
系所名稱: |
理學院 - 化學系 Department of Chemistry |
論文出版年: | 2016 |
畢業學年度: | 104 |
語文別: | 中文 |
論文頁數: | 116 |
中文關鍵詞: | 多重鍵 、雙鉬錯合物 、腈類 |
外文關鍵詞: | multiple bonds, Mo-Mo complex, nitriles |
相關次數: | 點閱:2 下載:0 |
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我們利用高立體阻礙的二牙團硼化雙氮基脒配基PhB(N-2,6-iPr2C6H3)2可以製備出一系列具金屬‒金屬多重鍵結且高活性的雙鉬金屬錯合物Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (2a)、[(THF)(K-18-C-6)]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (3)與[(THF)2(K-18-C-6)]2Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (4)。
錯合物2a,可以與有機腈類和炔類進行[2+2]環化加成反應後,分別得到錯合物[µ-η2-(R)CN]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (5: R = Me; 6: R = Ph) 和[µ-η2-HCC(SiMe3)]Mo2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (16),並形成Mo2CN或Mo2C2四員環;有趣的是,錯合物2a、3可與有機腈類進行[2+2+2]環化加成反應,得到錯合物[µ-η1:η1-NC(Ph)C(Ph)N]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (7)與[µ-η2-NC(CH3)N(K-18-C-6)C(CH3)]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (10)。
錯合物2a、4分別可以對氮‒氮雙鍵及碳‒氮三鍵進行活化,得到錯合物cis-(C6H5N-Mo)2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (14)及(PhC)(N)Mo2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (12),並且切斷氮‒氮雙鍵與碳‒氮三鍵。
The purpose of the study was to treat novel multiply bonded complexes with organic nitriles. Using a boraamidinate ligand to support the Mo-Mo multiple bond forms three types Mo-Mo multiply bonded complexes: Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (2a), [(THF)(K-18-C-6)]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (3) and [(THF)2(K-18-C-6)]2Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (4). And the bond order between the metals are 4, 4.5 and 5.
Reaction of 2a and organic nitriles underwent a [2+2] cycloaddition and obtained [µ-η2-(R)CN]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (5: R = Me; 6: R = Ph) with a four-membered ring. Reacting with alkynes yielded a four-membered ring product, [µ-η2-HCC(SiMe3)]Mo2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (16), as well. Furthermore, treatment of 2a and 3 with nitriles obtained [µ-η1:η1-NC(Ph)C(Ph)N]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (7) and [µ-η2-NC(CH3)N(K-18-C-6)C(CH3)]Mo2[µ-κ2-PhB(N-2,6-iPr2C6H3)2]2 (10) through a [2+2+2] cycloaddition pathway.
Interestingly, reaction of 2a and 4 could activate N-N double bond and C-N triple bond and form cis-(C6H5N-Mo)2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (14) and (PhC)(N)Mo2[µ-η2-(Ph)B(N-2,6-iPr2C6H3)2]2 (12).
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