Jms 700n mass spectrometer

All experiments were carried out
using standard vacuum line and Schlenk techniques under Ar atmosphere
or in the drybox. All the reagents were of the highest grade available
and were used without further purification. All solvents used for
the syntheses were distilled according to the general procedure. Trityl
tetrakis(pentafluorophenyl)borate^{18 (link)} and
diisopropyl(1-naphthyl)silane (1a)^14b were synthesized according to the previously reported method. ¹H NMR and ¹³C NMR spectral measurements were performed
on Bruker AV400M spectrometers. ¹H and ¹³C chemical
shifts are reported relative to the residual protonated solvent, respectively,
according to the literature.^{19 (link)} High-resolution
mass spectra were measured by a JEOL JMS-700N mass spectrometer operated
by electron impact ionization (EI). Gel permeation liquid chromatography
(GPLC) was performed by a Japan Analytical Industry LC-918 using chloroform
as an eluent.