Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
Org Lett. 2010 Feb 5;12(3):600-2. doi: 10.1021/ol902641v.
The cationic fluorosilane 1-Ant(2)FSi-2-Me(2)S-(C(6)H(4)) (2(+)) readily complexes fluoride ions to afford the corresponding zwitterionic difluorosilicate complex 1-Ant(2)F(2)Si-2-Me(2)S-(C(6)H(4)) (2-F) with a binding constant in CHCl(3) of 7 (+/-1) x 10(6) M(-1). Structural and computational results indicate that the high fluorophilicity of 2(+) arises from both Coulombic and cooperative effects reflected by the formation of a Si-F-->S bridge with a F-->S distance of 2.741(3) A.
阳离子氟硅烷 1-金刚烷(2)FSi-2-Me(2)S-(C(6)H(4)) (2(+)) 很容易与氟离子络合，生成相应的两性二氟硅酸盐配合物 1-金刚烷(2)F(2)Si-2-Me(2)S-(C(6)H(4)) (2-F)，其在 CHCl(3) 中的结合常数为 7(+/-1) x 10(6) M(-1)。结构和计算结果表明，2(+) 的高亲氟性既源于库仑效应，也源于协同效应，这体现在 Si-F-->S 桥的形成上，其中 F-->S 距离为 2.741(3) A。
