Why the mass spectra of a compound containing 1 chlorine atom don´t show the intensity pattern 3:1 ratio of M and M+2 peaks?

Hi everyone, I did the analysis of some chlorine organic compounds (with one chlorine) by ESI-MS-QTOF and I figure out that the obtained spectra don´t show the intensities ratio pattern of 3:1,...

11 March 2021 9,242 3 View