Synthesis and structural characterization of a remarkably stable,anionic, incompletely condensed silsesquioxane framework
Synthesis and structural characterization of a remarkably stable,anionic, incompletely condensed silsesquioxane framework
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DOI：
10.1039/a701005b
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发表时间：
1997
影响因子：
4.9
通讯作者：
F. Feher;Shawn H. Phillips;J. Ziller
中科院分区：
文献类型：
--
作者：
F. Feher;Shawn H. Phillips;J. Ziller
[(C6H11)7Si7O9(OH)3]1(2当量)[(C6H11)7Si7O9(OTL)3]3与[PPh4]Cl、[PbUn4]Cl和[NbUn4]Br3反应生成相应的盐[(C6H11)7Si7O10(OH)2]-5(即1的去质子化得到的单阴离子)，[(NbUn4]+盐5的单晶X射线衍射研究表明，这些分子以孤立的离子对形式存在，具有较强的分子内氢键；讨论了这一结果对二氧化硅化学的影响。
The reaction of [(C 6 H 11 ) 7 Si 7 O 9 (OH) 3 ] 1 (2 equiv.) with [(C 6 H 11 ) 7 Si 7 O 9 (OTl ) 3 ] 3 affords a conproportionation product that reacts with [PPh 4 ]Cl, [PBu n 4 ]Cl and [NBu n 4 ]Br to produce the corresponding salts of [(C 6 H 11 ) 7 Si 7 O 10 (OH ) 2 ] - 5 (i.e. the monoanion derived from deprotonation of 1); a single-crystal X-ray diffraction study of the [(NBu n 4 ] + salt of 5 indicates that the molecules exist as isolated ion pairs with strong intramolecular hydrogen bonding; implications of this result for the chemistry of silica are discussed.