Probing the Effect of Organic and Organometallic Functionalization on [1,5]-Silicon Shifts in Indenylsilanes
作者:Mark Stradiotto、Paul Hazendonk、Alex D. Bain、Michael A. Brook、Michael J. McGlinchey
DOI:10.1021/om990650f
日期:2000.2.1
substitution on the rate of [1,5]-silicon shifts in this class of compounds. In an attempt to prepare 1,1,3-tris(trimethylsilyl)indene (7), the hitherto unknown silicon-functionalized bis(trimethylsilyl)dibenzo[a,d]fulvalene (9) was unexpectedly generated; this species was characterized by use of both NMR spectroscopy and X-ray crystallography and was rationally prepared in 68% yield from 3,3‘-bis(1-(trimethylsilyl))indene
为了探测取代对这类化合物中[1,5]-硅移位速率的影响,已经制备了带有有机和有机金属取代基的茚基硅烷。为了制备1,1,3-三(三甲基甲硅烷基)茚(7),出乎意料地生成了迄今未知的硅官能化的双(三甲基甲硅烷基)二苯并[ a,d ]富瓦烯(9)。该物种的特征是使用NMR光谱学和X射线晶体学表征,由3,3'-双(1-(三甲基甲硅烷基))茚(16)合理制备,产率为68%。1,3-二甲基-1-(三甲基甲硅烷基)茚(18)的分子动力学和晶体学表征的铬配合物(η使用1D-选择性反转和2D-EXSY NMR技术检测了6 -1,3-二甲基-1- exo-(三甲基甲硅烷基)茚基三羰基铬(22);出人意料的是,铬和甲基取代基的存在对[1,5] -硅位移(速度的影响可以忽略Δ ģ ⧧ = 23-24千卡摩尔- 1)相对于母体化合物1-(三甲硅烷基)茚(3)(Δ ģ ⧧听,说:24千卡摩尔- 1)。在18的情况下,中间异茚18-