1290631-67-2Relevant academic research and scientific papers
Ph2P(BH3)Li: From ditopicity to dual reactivity
Barozzino Consiglio, Gabriella,Queval, Pierre,Harrison-Marchand, Anne,Mordini, Alessandro,Lohier, Jean-Francois,Delacroix, Olivier,Gaumont, Annie-Claude,Gerard, Helene,Maddaluno, Jacques,Oulyadi, Hassan
, p. 6472 - 6480 (2011)
A multinuclear NMR study shows that the deprotonation of diphenylphosphine-borane by n-BuLi in THF leads to a disolvated lithium phosphido-borane Ph2P(BH3)Li of which Li+ is connected to the hydrides on the boron and two THF molecules rather than to the phosphorus. This entity behaves as both a phosphination and a reducing agent, depending on the kinetic or thermodynamic control imposed to the reaction medium. Density functional theory computations show that H2P(BH 3)Li exhibits a ditopic character (the lithium cation can be in the vicinity of the hydride or of the phosphorus). It explains its dual reactivity (H- or P-addition), both routes going through somewhat similar six-membered transition states with low activation barriers.
