Abstract
The mass-spectra of cyanoguanidine, urea, melamine, and their hydroxymethylated or methoxymethylated derivatives were measured by the in-beam ionization method.
In the mass-spectra of hydroxymethylated derivatives, the molecular ions have been scarecely observed and small peaks of dehydrated ions usually observed. The basal peaks in these mass-spectra were observed at the mass number of cyanoguanidine, urea or melamine itself, respectively.
On the other hand, the molecular ions or the protonated molecular ions were detected in the mass-spectra of alkoxymethylated derivatives. The basal peaks in these were different from those of hydroxymethylated derivatives.
The reaction products of monomethoxymethyl-and monoethoxymethyl-cyanoguanidine with a large excess of formaldehyde were determined by the mass-spectrometry and 1H-and 13C-NMR spectroscopy as 4-cyanoimino-3-methoxymethyl-1, 3, 5-oxadiazine and 4-cyanoim ino-3-ethoxymethyl-1, 3, 5-oxadiazine.
