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| 題 名 | The Nitrogen-Assisted Triphenylphosphine Displacement of 3-Hydroxypyridine and 3-Aminopyridine Ligands in Palladium(Ⅱ) Complexes: Crystal Structures of [Pd(PPh₃)Br]₂{μ,η²-C₅H₃N(OH)}₂ and [Pd(PPh₃)Br]₂{μ,η²-C₅H₃N(NH₂)}₂ |
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| 作 者 | 易光輝; 王曉芬; 黃克峰; 官常慶; 李錦祥; | 書刊名 | Journal of the Chinese Chemical Society |
| 卷 期 | 56:4 2009.08[民98.08] |
| 頁 次 | 頁718-724 |
| 分類號 | 346.05 |
| 關鍵詞 | 2-Bromo-3-hydroxypyridine; 3-Amino-2-bromopyridine; Palladium; Dipalladium; Nitrogen-assisted; X-ray diffraction; |
| 語 文 | 英文(English) |
| 英文摘要 | Treatment of Pd(PPh3)4 with 2-bromo-3-hydroxypyridine [C5H3N(OH)Br] and 3-amino-2-bromopyridine [C5H3N(NH2)Br] in dichloromethane at ambient temperature cause the oxidative addition reaction to produce the palladium complex [Pd(PPh3)2{η1-C5H3N(OH)}(Br)], 2 and [Pd(PPh3)2{η1-C5H3N(NH2)}(Br)], 3, by substituting two triphenylphosphine ligands, respectively. In dichloromethane solution of complexes 2 and 3 at ambient temperature for 3 days, it undergo displacement of the triphenylphosphine ligand to form the dipalladium complexes [Pd(PPh3)Br]2{μ,η2-C5H3N(OH)}2, 4 and [Pd(PPh3)Br]2{μ,η2-C5H3N(NH2)}2, 5, in which the two 3-hydroxypyridine and 3-aminopyridine ligands coordinated through carbon to one metal center and bridging the other metal through nitrogen atom, respectively. Complexes 4 and 5 are characterized by X-ray diffraction analyses. |
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