Regioselectivity of the reactions of lithium vinyl- and isopropenylcyclopentadienides C5H4C(R)=CH2 -Li+(R = H, Me) and lithium tetramethylvinylcyclopentadienide C5Me4CH=CH2 -Li+ with various electrophilic agents (Me3SiCl, Me3SnCl, Et2PCl, 2-chloro-1, 3-dioxaphospholane, and MeI) was studied. Two new monocyclopentadienyl zirconium complexes, [C5H4C(Me) = CH2]ZrCl3 · 2THF and [C5Me4CH=CH2]ZrCl3 · 2THF, were synthesized. Their crystal structures were established by X-ray diffraction. The results of quantum chemical calculations for the C5H4C(R) = CH2 - (R = H, Me) and C5Me4CH=CH2 - anions by the DFT method (RMPW1PW91) with the 6-311+G(d, p) split valence basis set are in good agreement with experimental data on the regioselectivity of their reactions with electrophilic agents.
研究了
乙烯基和异
丙烯基
环戊二烯锂 C5H4C(R)=
CH2-Li+(R = H,Me)和四甲基
乙烯基环戊二烯锂 C5Me4CH= -Li+ 与各种亲电剂(Me3SiCl、Me3SnCl、Et2PCl、2-
氯-1,3-二氧
磷杂环戊烷和 MeI)反应的区域选择性。合成了两种新的单
环戊二烯锆配合物,即 [C5H4C(Me) = ]ZrCl3 - 2THF 和 [C5Me4CH= ]ZrCl3 - 2THF。通过 X 射线衍射确定了它们的晶体结构。采用 6-311+G(d, p) 分裂价基集的 DFT 方法 (
RMPW1PW91) 对 C5H4C(R) = - (R = H, Me) 和 C5Me4CH= - 阴离子进行量子
化学计算的结果与它们与亲电剂反应的区域选择性实验数据十分吻合。