Abstract
The proton affinities of 4,6-dimethyl-pyrimidine and 4-methyl-pyrimidine have been measured using the kinetic method on a pentaquadrupole mass spectrometer. 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.
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