Synthesis and Isolation of a Silylsilicate Containing Two Pentacoordinated Silicon Atoms by Monoprotonation of a Disilicate and Monodeprotonation of a Disilane
Synthesis and Isolation of a Silylsilicate Containing Two Pentacoordinated Silicon Atoms by Monoprotonation of a Disilicate and Monodeprotonation of a Disilane
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DOI：
10.1021/om500291k
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发表时间：
2014-05-12
期刊：
影响因子：
2.8
通讯作者：
Kawashima, Takayuki
中科院分区：
文献类型：
--
作者：
Kano, Naokazu;Sasaki, Keishi;Kawashima, Takayuki
合成并分离了一种硅烷基硅酸盐，它是在两个五配位硅原子上带有两组C，O-二齿配体的二硅酸盐的双质子化中得到二硅烷的中间体。硅烷基硅酸盐和乙硅烷的X射线晶体学分析揭示了分子内O中心点Si配位，给出了硅原子五配位态。在硅烷基硅酸盐中，Si 1-O-2和Si 2-O-3键几乎平行。甲硅烷基硅酸盐的去质子化，这也是由二硅烷的单去质子化制备的，得到二硅酸盐。氧化电位和UV/维斯吸收最大值都介于二硅酸盐和乙硅烷的氧化电位和UV/vis吸收最大值之间，反映了电荷的变化。
A silylsilicate, which is an intermediate in double protonation of a disilicate bearing two sets of a C,O-bidentate ligand at two pentacoordinated silicon atoms to give a disilane, was synthesized and isolated. The X-ray crystallographic analysis of both the silylsilicate and the disilane revealed intramolecular O center dot center dot center dot Si coordination, giving the silicon atoms pentacoordinated states. In the silylsilicate, the Si1-O-2 and Si2-O-3 bonds are almost in parallel. Deprotonation of the silylsilicate, which was also prepared by monodeprotonation of the disilane, gave the disilicate. The oxidation potential and UV/vis absorption maximum are both intermediate between those of the disilicate and the disilane, reflecting the changes in the charges.