synthesis of disilylfluoronium ions 4 with a naphthalene-1,8-diyl backbone via the corresponding areniumions 3 is reported. The cations were isolated in the form of their [B(C6F5)4]− salts. The borates 3[B(C6F5)4] and 4[B(C6F5)4] are active in catalytic hydrodefluorination reactions using fluorodecane as substrate. Methylphenyl-substituted areniumions 3c,d undergo an interconversion reaction via a formal
据报道,具有萘-1,8-二基主链的二甲硅烷基氟离子4通过相应的芳烃离子3的合成。阳离子以其[B(C 6 F 5)4 ] -盐的形式分离。硼酸酯3 [B(C 6 F 5)4 ]和4 [B(C 6 F 5)4 ]在以氟癸烷为底物的催化加氢氟化反应中具有活性。甲基苯基取代的芳族离子3c,d在室温下通过1,3-甲基的正式迁移进行相互转化反应。DFT方法表明这种重排是通过多步序列进行的,该多步序列涉及一种类似甲基的过渡态。与DFT计算一致,二甲硅烷基氟离子4的NMR参数表明在这些阳离子中存在对称的Si-F-Si键。QTAIM,NBO和VB分析表明,SiFSi部分中键合的高离子贡献是这些阳离子的对称结构的原因。
The photophysical properties of naphthalene bridged disilanes
作者:Vipin B. Kumar、Cassandra L. Fleming、Sai Shruthi Murali、Paul A. Hume、Nathaniel J. L. K. Davis、Tilo Söhnel、Erin M. Leitao
DOI:10.1039/d1ra02961d
日期:——
isomers of naphthalene-bridged disilanes were prepared via catalytic intramolecular dehydrocoupling of disilyl precursors using Wilkinson's catalyst. Interestingly, it was observed that interchanging the side groups on the silicon atoms altered the photophysical properties of the bridged disilanes. Herein, we report the first example of naphthalene bridged disilanes forming excimers in non-polar solvents