Chlorine-Bromine Combination Isotope Intensities

Chlorine-Bromine Combination Isotope Intensities Reference Compounds under Electron-Impact Conditions in Mass Spectrometry... 

Rule 4 The actual number of chlorine or bromine atoms can be derived from the table in the section entitled Chlorine-Bromine Combination Isotope Intensities. ... 

Chlorine-Bromine Combination Isotope Intensities Section 16 Health and Safety Information... 

CHLORINE-BROMINE COMBINATION ISOTOPE INTENSITIES Thomas J. Bruno and Paris D. N. Svoronos... 

Table 9.12 Intensities of isotope peaks (relative to the parent peak) for combinations of bromine and chlorine...

Table 2.3 Intensities of Isotope Peaks (Relative to the Molecular Ion) for Combinations of Bromine and Chlorine...

Due to the distinctive mass spectral patterns caused by the presence of chlorine and bromine in a molecule, interpretation of a mass spectrum can be much easier if the results of the relative isotopic concentrations are known. The following table provides peak intensities (relative to the molecular ion (M+) at an intensity normalized to 100%) for various combinations of chlorine and bromine atoms, assuming the absence of all other elements except carbon and hydrogen.1 The mass abundance calculations were based on the most recent atomic mass data.1... 

RELATIVE INTENSITIES OF ISOTOPE PEAKS FOR VARIOUS COMBINATIONS OF BROMINE AND CHLORINE... 

Table 8.6 in Section 8.5 can be used to determine what the ratio of the intensities of the molecular ion and isotopic peaks should be when more than one chlorine or bromine is present in the same molecule. The mass spectra of dichloromethane (Fig. 8.51), dibromomethane (Fig. 8.52), and l-bromo-2-chloroethane (Fig. 8.53) are included here to illustrate some of the combinations of halogens listed in Table 8.6. 

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