2,6-Diaryl pyridinium cation-A precursor in the cleavage process of 5,7-diaryl-piperidino[3,4-d]-1,2,3-selenadiazoles/thiadiazoles

摘要

The mass spectra of 5,7-diphenylpiperidino[3,4-d]-1,2,3-selenadiazole 1, 5,7-di(4-methoxyphenyl)piperidino[3,4-d]-1,2,3-selenadiazole 2, 5;7-di(4-chlorophenyl) piperidino [3,4-d]-1,2,3-selenadiazole 3,5,7-diphenylpiperidino [3,4-d]-1,2,3-thiadiazole 4,5,7-di()4-methyloxy-phenyl) piperidino [3,4-d]-1,2,3-thiadiazole 5 and 5,7-di (4-chlorophenyl) piperidino [3,4-d]-1,2,3-thiadiazole 6, have been studied under electron impact by low and high resolution mass spectrometry. It has been observed. that 2,6-diaryl pyridinium cation is the predominant precursor ion in the cleavage process of the above molecules.