Molecular Gallosilicates and Their Group 4 Multimetallic Derivatives
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- 作者：Diego Solis-Ibarra ; Miriam de J. Vela虂squez-Herna虂ndez ; Rau虂l Huerta-Lavorie ; Vojtech Jancik
- 刊名：Inorganic Chemistry
- 出版年：2011
- 出版时间：September 19, 2011
- 年：2011
- 卷：50
- 期：18
- 页码：8907-8917
- 全文大小：1100K
- 年卷期：v.50,no.18(September 19, 2011)
- ISSN：1520-510X
文摘
Reaction between the silanediol (HO)2Si(OtBu)2 and gallium amides, LGaCl(NHtBu) and LGa(NHEt)2 (L = [HC{C(Me)N(Ar)}2]鈭?/sup>, Ar = 2,6-iPr2C6H3), respectively, resulted in the facile isolation of molecular gallosilicates LGaCl(渭-O)Si(OH)(OtBu)2 (1) and LGa(NHEt)(渭-O)Si(OH)(OtBu)2 (2). Compound 2 easily reacts with 1 equiv of water to form the unique gallosilicate-hydroxide LGa(OH路THF)(渭-O)Si(OH)(OtBu)2 (3). Compounds 1鈥?b>3 contain the simple Ga鈥揙鈥揝iO3 framework and are the first structurally authenticated molecular gallosilicates. These compounds may be used not only as models for gallosilicate-based materials but also as further reagents because of the presence of reactive functional groups attached to both gallium and silicon atoms. Accordingly, seven molecular heterometallic compounds were obtained from the reactions between compound 3 and group 4 amides M(NMe2)4 (M = Ti, Zr) or M(NEt2)4 (M = Ti, Zr, Hf). Hence, by tuning the reactions conditions and stoichiometries, it was possible to isolate and structurally characterize the complete 1:1 and 2:1 series (4鈥?b>10). Completely inorganic cores of types M鈥揙鈥揋a鈥揙鈥揝i鈥揙 and spiro M[O鈥揋a鈥揙鈥揝i鈥揙]2 were obtained and characterized by common spectroscopic techniques.