The preparation and molecular structure of the highly sterically hindered tris(trimethylsilyl)methylboron compound (Me3Si)3CB(Ph)[O(CH2)4C(SiMe3)3]
作者:Colin Eaborn、Negussie Retta、J. David Smith、Peter B. Hitchcock
DOI:10.1016/s0022-328x(00)96079-0
日期:1982.9
reaction between (Me3Si)3CLi and BF3 in Et2O/THF gives the fluoride (Me3Si)3CB(F)[O(CH2)4C(SiMe3)3], which upon treatment with PhLi gives the corresponding phenyl compound (Me3Si)3CB(Ph)[O(CH2)4C(SiMe3)3]. A single crystal X-ray diffraction study has shown that in the latter the three bonds to boron lie in a plane, which is almost perpendicular to the plane of the Ph group. The CSiMe3 bonds (mean 1.900(12)
(Me 3 Si)3 CLi与BF 3在Et 2 O / THF中的反应产生了氟化物(Me 3 Si)3 CB(F)[O(CH 2)4 C(SiMe 3)3 ],该氟化物经处理与PhLi一起得到相应的苯基化合物(Me 3 Si)3 CB(Ph)[O(CH 2)4 C(SiMe 3)3 ]。单晶X射线衍射研究表明,在后者中,硼的三个键位于一个平面中,该平面几乎垂直于Ph基团的平面。该CSiMe 3 键(平均1.900(12)Å)比SiMe键(平均1.867(15)Å)长,ClongerSiMe角(平均113.0(13)°)大于Me theSi Me角(平均105.6(12)°)。