In the mass spectrum of 2,2-dimethylpropane, it is given that the base peak occurs at m z 57, peaks of moderate intensity are found at m z 29 and 43, and a weak peak occurs at m z 15, from which m z for P + is to be determined. Concept Introduction : The chemical formula for 2,2-dimethylpropane, which is also known an Neopentane, is C 5 H 12 . This is a highly inflammable gas under normal conditions of temperature and pressure, and under lower temperatures, it could easily get converted to a highly volatile liquid

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Chapter 8.5, Problem 2E

(a)

Interpretation Introduction

Interpretation: In the mass spectrum of 2,2-dimethylpropane, it is given that the base peak occurs at mz 57, peaks of moderate intensity are found at mz 29 and 43, and a weak peak occurs at mz 15, from which mz for P+ is to be determined.

Concept Introduction: The chemical formula for 2,2-dimethylpropane, which is also known an Neopentane, is C5H12 . This is a highly inflammable gas under normal conditions of temperature and pressure, and under lower temperatures, it could easily get converted to a highly volatile liquid

(b)

Interpretation Introduction

Interpretation: In the mass spectrum of 2,2-dimethylpropane, it is given that the base peak occurs at mz 57, peaks of moderate intensity are found at mz 29 and 43, and a weak peak occurs at mz 15, for which using curved arrows to symbolize the flow or electrons, the specific fragmentation peaks needs to be accounted.

Concept Introduction: Fragmentation is the process in which energetically unstable molecular ions gets dissociated, when these molecules are passed through the ionization chamber of a mass spectrometer.

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