Rare-Earth Amidate Complexes. Easily Accessed Initiators For ε-Caprolactone Ring-Opening Polymerization
作者:Louisa J. E. Stanlake、J. David Beard、Laurel L. Schafer
DOI:10.1021/ic8010635
日期:2008.9.15
The direct synthesis of yttrium amidate complexes using the simple reaction of amide proligands and Y(N(SiMe3)2)3 results in the high-yielding preparation and isolation of crystalline, monomeric materials. The complex, tris(N-2',6'-diisopropylphenyl(naphthyl)amidate)yttrium mono(tetrahydrofuran) (4), was structurally determined to be a 7-coordinate C1 symmetric structure, maintaining one bound tetrahydrofuran
使用酰胺配体和Y(N(SiMe3)2)3的简单反应直接合成酰胺酸钇配合物,可以高产率地制备和分离结晶的单体材料。三(N-2',6'-二异丙基苯基(萘基)氨基甲酸酯)钇单(四氢呋喃)(4)配合物在结构上确定为7坐标的C1对称结构,维持一个结合的四氢呋喃分子。在单斜空间群P2(1)/ c中结晶的化合物4(C12H17 [NCO] C10H7)3Y(C4H8O),其a = 13.7820(11)A,b = 33.598(3)A,c = 16.0575(12)A, α= 90度,β= 98.762(3)度,γ= 90度,Z =4。同一化合物的溶液相NMR光谱表征显示出高度对称的物质,与这些化合物的通量配位环境一致。