Synthesis and Structures of Extended Cyclic Siloxanes
Synthesis and Structures of Extended Cyclic Siloxanes
复制标题
长环状硅氧烷的合成和结构
DOI：
10.1002/hc.21198
复制
发表时间：
2014
影响因子：
0.3
通讯作者：
Hisayuki Endo and Nobuhiro Takeda
中科院分区：
文献类型：
--
作者：
Masafumi Unno;Hisayuki Endo and Nobuhiro Takeda
全顺四硅氧基环四硅氧烷(扩展环硅氧烷)[I-BUSI(OSiHMe2)O]41、[PHSI(OSiHMe2)O]42和[CH2=CHSi(OSiHMe2)O]43的合成是通过三烷氧基硅烷的硅醇钠或硅酸钾完成的。1或2与间氯过氧基苯甲酸反应得到扩展的环状硅烷醇[I-BUSI(OSiMe2OH)O]44和[PHSI(OSiMe2OH)O]45。X-射线单晶衍射法确证了化合物4和5的结构。在这些新化合物中，化合物3在分子中同时具有乙烯基和氢硅基，因此这可能是一种潜在的笼状倍半硅氧烷单体。扩展的环状硅烷醇4和5含有四个相同方向的硅醇部分，笼状倍半硅氧烷的主体分子或构建单元的应用是可望的。
The facile synthesis of all‐cis‐tetrasiloxycyclotetrasiloxanes (extended cyclic siloxanes) [i‐BuSi(OSiHMe2)O]41, [PhSi(OSiHMe2)O]42, and [CH2= CHSi(OSiHMe2)O]43was accomplished via sodium or potassium silanolates from respective trialkoxysilanes. The treatment of1or2withm‐chloroperoxybenzoic acid afforded respective extended cyclic silanols [i‐BuSi(OSiMe2OH)O]44and [PhSi(OSiMe2OH)O]45. The structures of4and5were unequivocally established by X‐ray crystallography. Among these new compounds, compound3possesses both vinyl and hydrosilyl groups in the molecule, thus this could serve as a potential monomer of well‐defined cage silsesquioxanes. Extended cyclic silanols4and5contain four silanol moieties in the same direction, and application of host molecules or building units of cage silsesquioxanes is expected.