The mass spectrum of CH₃Cl is illustrated here. You know that carbon has two stable isotopes, ¹²C and ¹³C with relative abundances of 98.9% and 1.1%, respectively, and chlorine has two isotopes, ³⁵Cl and ³⁷Cl with abundances of 75.77% and 24.23%, respectively.

(a) What molecular species gives rise to the lines at m/Z of 50 and 52? Why is the line at 52 about 1/3 the height of the line at 50?

(b) What species might be responsible for the line at m/Z = 51?

Transcribed Image Text:

Relative Abundance 100 80 20 0 10 20 30 (m/2) 40 """ 50 60