Application Examine the following spectrum of chlorobenzene Benzene, chloro- MAS

Question

Application Examine the following spectrum of chlorobenzene Benzene, chloro- MASS SPECTRUM 100 40 20- 0.0 20 40 60 100 120 m/z NIST Chemistry WebBook (http.l/webbook.nist.gov/chemistry) A. What is the mass of the base peak in this spectrum? B. Write formulas for the ions that produce the three largest peaks. 4 Examine the two mass spectra below. One is 1-bromo-4-ethylbenzene and one is 2-bromoethyl benzene. Determine which is which and explain your reasoning. A. MASS SPECTRUM MASS SPECTRUM 60- 60- 0.0 40 80 120 160 200 0.0 0.0 40 120 1 200 160 NIST Chemistry Wetookhttp//webbook.nist.gov/chemistry, NIST Chemistry WebBookhttp://webbook.rist.gov/chemistry) m/z s Spectra Interpretation

Explanation / Answer

39)

A) base peak = highest intensity

Mass of base peak , m/z = 112

It is due to C6H5Cl35]+.

B) Formula of ions of 3 largest peaks:

  m/z = 112 due to C6H5Cl35]+. (or) PhCl35]+.

m/z = 114 due to C6H5Cl37]+. (or) PhCl37]+.

m/z = 77 due to C6H5]+.   (or) Ph]+.

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