Assignment:
Suggest structure fragmentation patterns that account for the following observed peaks in the mass spectra.
A) 5-methyl-2-hexanone, m/e= 71, 58, 43
B) C6H5CH2OCH3, m/e= 122, 121, 91, 77
C) 1-bromopropane, m/e= 124,122, 43, 29, 15
Provide complete and step by step solution for the question and show calculations and use formulas.