The striking reactivity of donor-stabilised silanone LSi(DMAP)O (1) [L = N(Ar)C(CH2)CHC(Me)N(Ar), Ar = 2,6-iPr2C6H3, DMAP = p-dimethylaminopyridine] toward Lewis acidic metal substrates Zn(OAc)2, ZnMe2, and AlMe3 is reported. Two unprecedented addition products onto the SiO double bond, [LSi(OAc)(μ-O)Zn(OAc)(DMAP)2] (2) and [LSi(OAc)(μ-O)]2Zn(DMAP) (3), and two terminal complexes LSi(DMAP)OâZnMe2 (4) and LSi(DMAP)OâAlMe3 (5) were obtained. Compounds 4 and 5 are unique, representing the first isolable and structurally characterised terminal SiOâZn and SiOâAl complexes. All new compounds were fully characterised by 1H, 13C, and 29Si NMR spectroscopy, EI-MS, elemental analysis and single-crystal X-ray diffraction analyses.
供体稳定的
硅烷酮 LSi(
DMAP)O (1) [L = N(Ar)C(
CH2)CHC(Me)N(Ar), Ar = 2,6-iPr2C6H3,
DMAP = 对二甲基
氨基吡啶] 的惊人反应活性报道了
路易斯酸性
金属底物 Zn(OAc)2、ZnMe2 和 AlMe3。 SiO 双键上有两个前所未有的加成产物,[LSi(OAc)(μ-O)Zn(OAc)(
DMAP)2] (2) 和 [LSi(OAc)(μ-O)]2Zn(
DMAP) (3 ),得到两个末端配合物LSi(
DMAP)O·ZnMe2 (4)和LSi(
DMAP)O·AlMe3 (5)。化合物 4 和 5 是独特的,代表了第一个可分离且具有结构特征的末端 SiO-Zn 和 SiO-Al 配合物。所有新化合物均通过 1H、13C 和 29Si NMR 光谱、EI-MS、元素分析和单晶 X 射线衍射分析进行了全面表征。