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| 題 名 | Formation of Alkyne Bridged Multicobalt Carbonyl Complexes with Tris(2-thienyl)Phosphine or Bis(Trimethylsilyethynyl)Phenylphosphine Ligand |
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| 作 者 | 洪豐裕; 廉芳菁; 張裕昌; 柯寶燦; | 書刊名 | Journal of the Chinese Chemical Society |
| 卷 期 | 49:4 2002.08[民91.08] |
| 頁 次 | 頁509-515 |
| 分類號 | 346.01 |
| 關鍵詞 | Phosphine; Pseudo-octahedral cobalt cluster; Six-membered ring; |
| 語 文 | 英文(English) |
| 英文摘要 | Treatment of CO□(CO)□ with an excess of trimethylsilylacetylene (TMSA) in the presence of tri(2-thienyl)phosphine in THF at 25℃ for 2 hours yielded six compounds. Two pseudo-octahedral, alkyne-bridged tetracobalt clusters, [CO□(μ□-η□-HC=CSiMe□)(CO)□(μ-CO)□] (4) and [Co□(μ□-η□-HC=CSiMe□)(CO)□(μ-CO)□{P(C□H□S)□}] (6), along with an alkyne-bridged discobalt complex, [Co□(CO)□(μ-HC=CSiMe□){P(C□H□S)□}] (5), were obtained as new compounds. The addition of the thienylphosphine ligand, in fact, facilitates the reaction rate. Reaction of an alkyne-bridged dicobalt complex, [(η□-H-C=C-SiMe□)Co□(CO)□] (3), with a bi-functional ligand, PPh(-C=C-SiMe□)□, yielded an unexpected six-membered, cyclic compound, {(Ph)(Me□Si-C=C)P[(η□-C=C-SiMe□)Co□(CO)□]}□ (7). All of these new compounds were characterized by spectroscopic means; the solid-state structures of (5), (6) and (7) have been established by X-ray crystallography. ; the solid-state structures of (5), (6) and (7) have been established by X-ray crystallography. |
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