Halogenated compounds are particularly easy to identify by their mass spectra be

Question

Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes.

Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant Chlorine occurs as s Cl (75.8%) and 37 Cl (24.2%); Bromine occurs as 79 Br (50.7%) and Br (49.3%) Boron compounds also stand out owing to the two isotopes 10 (19.9%) and B (80.1%) For the compound Chlorocyclohexane, C6H11Cl: At what masses do the molecular ions occur? (List in order of increasing mass separated by commas, e.g. 120,122 What are the percentages of each molecular ion? List to nearest 1% in order of increasing mass separated by commas, e.g. 55,45.)

Explanation / Answer

As per mentioned mainly based on chloro cyclohexane will get molecular ions 118 and 120 (due chlorine isotopes, Cl 35 118 and Cl37 120 ). other major peaks 82 (de chloro cyclohexane fragment, 62 fragment open cyclohexane M-52)

this ratio's also same as chlorine isotpe abundence

Chloro cyclohexane mass analysis ratios , 118 molecular ion 75.80% , and

120 molocular ion 24.20%

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