Pd. Thomas et Rjs. Morrison, Measurement of the proton affinities of some methyl substituted pyrimidines via the kinetic method on a pentaquadrupole mass spectrometer, INT J MASS, 194(2-3), 2000, pp. 133-143
The proton affinities of 4,6-dimethyl-pyrimidine and 4-methyl-pyrimidine ha
ve been measured using the kinetic method on a pentaquadrupole mass spectro
meter. The experimental affinities are compared with those calculated by ab
initio molecular orbital methods. Some unexpected results obtained during
this work have been attributed to the formation of the 6-methyl-pyrimidin-4
-yl radical and its proton affinity has also been estimated by both theory
and experiment. (Int J Mass Spectrom 194 (2000) 133-143) (C) 2000 Elsevier
Science B.V.