Divalent europium and ytterbium complexes supported by a bulky 2-pyridyl amido ligand: synthesis, structure and reactivity studies
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香港中文大學研究人員

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摘要Metallation of the N-arylated 2-pyridyl amine [HN(C6H3Pr2i-2,6)(2-C5H3N-6-Me)] (1) with potassium hydride in Et2O and THF yielded potassium amides [{KL(OEt2)}(2)] [L = N(C6H3Pr2i-2,6)(2-C5H3N-6-Me)] (2) and KL(THF)(2) (3), respectively. Treatment of LnI(2)(THF)(2) (Ln = Eu, Yb) with 2 afforded the corresponding Ln(II) amido complexes [EuL(mu-L)(2)K(THF)] (4) and [YbL2(THF)(2)] (5). In contrast, an analogous reaction of SmI2(THF)(2) with 2 only led to the isolation of homoleptic Sm(III) triamide [SmL3] (6). The reaction chemistry of divalent complexes 4 and 5 was examined. Oxidation of the Eu(II) amido complex 4 by iodine yielded the trivalent [EuL3] (7), whereas addition of Yb(II) diamide 5 to iodine led to the isolation of the bis(amido) Yb(III) iodide complex [YbL2(I)(THF)] (8). Complex 8 could also be prepared by the reaction of 5 with copper(I) iodide. A subsequent reaction of 8 with KOBut gave, unexpectedly, the Yb(III) triamide [YbL3] (9). Reactions of complex 5 with diphenyl dichalcogenides PhEEPh (E = S, Se, Te) also gave [YbL3] (9) as the only isolable product. The solid-state structures of complexes 2 and 4-9 were elucidated by X-ray diffraction analysis.
著者Ku KW, Au CW, Chan HS, Lee HK
期刊名稱Dalton Transactions
出版年份2013
月份1
日期1
卷號42
期次8
出版社Royal Society of Chemistry
頁次2841 - 2852
國際標準期刊號1477-9226
電子國際標準期刊號1477-9234
語言英式英語
Web of Science 學科類別Chemistry; Chemistry, Inorganic & Nuclear; CHEMISTRY, INORGANIC & NUCLEAR

上次更新時間 2020-19-10 於 02:09