Details of Molecule lithium 2-allyl-4,4,5,5-tetramethyl-2-phenyl-1,3,2-dioxaborolan-2-uide (in MeCN)

This boronate complex was unstable in MeCN solutions, leading to decomposition during the course of the
measurements when conducted at higher concentrations (>2.0 x 10−3 M). Kinetics studied within the range of
boronate concentrations 4.0 x 10−4 M to 3.2 x 10−3 M were found to have second-order rate constants within 6%
error. However, the reduced rate of reaction with
benzhydrylium ion (dma)2CH+ leads to greater decomposition of this boronate compleax and a significant error in measurement. Consequently, the nucleophilicity parameter N reported has a large error (approximately ± 0.6
units).