Question

An organic compound contains carbon, hydrogen, and two other element(s). Its mass spectrum has M+ peak...

An organic compound contains carbon, hydrogen, and two other element(s). Its mass spectrum has M+ peak at m/z=121 and M+2 peak at m/z=123. Their relative intensities are 3:1. What are the two other elements in the compound?

Homework Answers

Answer #1

n/z = 121 odd number indicates the presence of nitrogen atoms. According to nitrogen rule if the m/z for molecular ion is odd number then it is has odd number of nitrogen atoms.

So one atom is confirmed as nitrogen.

The relative intensity 3:1 indicates the presence of chlorine atoms

For bromine atom the relative intensity is 1:1

Therefore, the remaining two elements are nitrogen and chlorine.

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