sample questions

1-A liquid compound gave mass spectrum showing a strong molecular ion at m/z 126. The only fragment ions are seen at m/z 127 and 29.
Suggest the structure of the compund.

Fragment ion amss 127=

Fragment ion mass 29=

2-A liquid compound gave mass spectrum in which the molecular ion appears as a pair of equal intensity peaks at m/z= 122 and m/z = 124. Small fragment ion peaks are seen at m/z = 107 and 109 ( equal intensity) , and at m/z = 79,80,81 & 82 (all roughly the same size). Large fragment ion is seen at m/z 43 (base peak).

Suggest a structure for this compund.

Fragment ion mass 122,124 =

Fragment ion mass 79,80,81 &82 are=

Base peak 43 =

Define the terms "Molecular ion" & " Base peak"

3-Given the mass spectrum below. Suggest a structure of the compund and assign structures for the molecular ion and fragment peaks.

4-The mass spectrum below is given by the structrue drawn nest to it assign structruer for the fragment ions and to theneutral fargments lost.