Question

3. a) The mass spectrum of benzyl bromide is shown below. Explain why two peaks are observed at 170 and 172 m/z in the mass spectrum. (1 point) b) Identify the base peak and the parent ion in the mass spectrum of benzyl bromide. (2 points) Base peak= 91 m/z Parent peak= Relative Intensity 91 65 172 170 m/z

          3. a) The mass spectrum of benzyl bromide is shown below. Explain why two peaks are observed at 170 and 172 m/z in the mass spectrum. (1 point)
b) Identify the base peak and the parent ion in the mass spectrum of benzyl bromide. (2 points)
Base peak= 91 m/z
Parent peak=
Relative Intensity
91
65
172
170
m/z
        
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3. a) The mass spectrum of benzyl bromide is shown below. Explain why two peaks are observed at 170 and 172 m/z in the mass spectrum. (1 point)
b) Identify the base peak and the parent ion in the mass spectrum of benzyl bromide. (2 points)
Base peak= 91 m/z
Parent peak=
Relative Intensity
91
65
172
170
m/z

Added by Victor Manuel A.

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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3. a) The mass spectrum of benzyl bromide is shown below. Explain why two peaks are observed at 170 and 172 m/z in the mass spectrum. (1 point) b) Identify the base peak and the parent ion in the mass spectrum of benzyl bromide. (2 points) Base peak= 91 m/z Parent peak=
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Transcript

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00:01 The compound benzobromite has a benzene ring and then of course a bromine coming off of it.
00:13 The molar mass is 171 .03 grams per mole.
00:25 So in looking at the mass spectrum, we have a base peak at 91, that being the largest peak.
00:40 And then we have two small peaks that are about the same at one, 171 and 172.
00:50 To explain these two peaks, we need to reference the common isotopes of bromine.
00:58 Bromene has two common isotopes, bromine 79 and bromine 81.
01:12 And both of them are at approximately 50 % abundance...
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