Nucleophilic Substitution Reactions in the [B3H8]− Anion in the Presence of Lewis Acids

Molecules

Mikhail S. Grigoriev¹  Nikolai T. Kuznetsov²  Alexey S. Kubasov²  Alexander Y. Bykov²  Alexandra T. Shulyak²  Konstantin Y. Zhizhin²  Andrey P. Zhdanov²  Nikita A. Selivanov²  Evgeniy O. Bortnikov³ 

[1] Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii Pr. 31-4, 119071 Moscow, Russia;Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Pr. 31, 119991 Moscow, Russia;Weizmann Institute of Science, Organic Chemistry, 234 Herzl Street, Rehovot 7610001, Israel;

关键词: boron;    borohydrides;    boranes;    nucleophilic substitution;    octahydrotriborate;    cluster;   

DOI  :  10.3390/molecules27030746

来源: DOAJ

【 摘 要 】

As a result of our study on the interaction between the octahydrotriborate anion with nucleophiles (Nu = THF, Ph₃P, Ph₂P-(CH₂)₂-PPh₂ (dppe), Ph₃As, Et₃N, PhNH₂, C₅H₅N, CH₃CN, Ph₂CHCN)) in the presence of a wide range of Lewis acids (Ti(IV), Hf(IV), Zr(IV), Al, Cu(I), Zn, Mn(II), Co(II) halides and iodine), a number of substituted derivatives of the octahydrotriborate anion [B₃H₇Nu] are obtained. It is found that the use of TiCl₄, AlCl₃, ZrCl₄, HfCl₄, CuCl and iodine leads to the highest product yields. In this case, it is most likely that the reaction proceeds through the formation of an intermediate [B₃H₇-HMXn_x], which was detected by NMR spectroscopy. The structures of [Ph₃P·B₃H₇] and [PhNH₂·B₃H₇] were determined by X-ray diffraction.

【 授权许可】

Unknown