14039-18-0Relevant articles and documents
1H and 13C NMR detection of the carbocations or zwitterions from Rhodamine B base, a fluoran-based black color former, trityl benzoate, and methoxy-substituted trityl chlorides in the presence of alkali metal or alkaline earth metal
Hojo, Masashi,Ueda, Tadaharu,Yamasaki, Masanori,Inoue, Akihiko,Tokita, Sumio,Yanagita, Mitsuhiro
, p. 1569 - 1576 (2007/10/03)
The cleavage of C-O bonds in two fluoran-based dyes by the addition of alkali metal (M+ = Li+, Na+) and alkaline earth metal (M2+ = Mg2+, Ba2+) perchlorates in acetonitrile solution was exa
The Effect of Both ?-Donor Substituents and Acid Media on the Formation of Trityl Cations, Studied by Relaxation Methods and NMR-Spectroscopy
Blumenstock, H.,Dickert, F.,Fackler, H.,Hammerschmidt, A.
, p. 157 - 170 (2007/10/02)
Trityl trifluoroacetates were taken to study why ion formation from ionogens is favoured by acid media.From relaxation measurements, NMR-spectroscopy and conductivity studies it was found that this effect is due to anion solvation by acid, namely a specific solvation of the free anions and a statistical solvation of the anions bound in the ionogen.This leads to a drastically reduced ion recombination rate constant even at low concentrations of acid and an increased dissociation rate constant at rather high concentrations of acid. -.Keywords: Kinetics/ Ion solvation/ Carbenium ions/ NMR-spectroscopy
