Readily available R8Si8O12 frameworks react selectively with aqueous Et4NOH to afford discrete incompletely-condensed silsesquioxanes: reaction of R8Si8O12 (2a, R = c-C6H11; 2b, R = Bui) with Et4NOH first produces endo-D2-R8Si8O11(OH)2 (3a, R = c-C6H11; 3b, R = Bui), which reacts further with Et4NOH to produce endo-C2-R8Si8O10(OH)4 (5a and 5b) and endo-C3-R7Si7O9(OH)3 (4a, R = c-C6H11; 4b, R = Bui); the reactions of Et4NOH with Me8Si8O12 (2c), (c-C6H11)7(H)Si8O12 (2d) and (c-C6H11)7(OH)Si8O12 (2d) also produce the corresponding trisilanols (i.e. endo-C3-R7Si7O9(OH)3 (4a, R = c-C6H11; 4c, R = Me).
现成的 R8Si8O12 框架可选择性地与 Et4NOH
水溶液反应,生成离散的不完全缩合
硅倍半氧烷:R8Si8O12(2a,R = c-
C6H11;2b,R = Bui)与 Et4NOH 反应首先生成内-D2-R8Si8O11(OH)2(3a,R = c- ;3b,R = Bui),再与 Et4NOH 反应生成内-C2-R8Si8O10(OH)4(5a 和 5b)和内-C3-R7Si7O9(OH)3(4a,R = c- ;4b,R = Bui);Et4NOH 与 Me8Si8O12(2c)、(c- )7(H)Si8O12(2d)和(c- )7(OH)Si8O12(2d)的反应也生成相应的三
硅醇(即内内-C3-R7Si7O9(OH)3(4a,R = c- ;4c,R = Me)。