The infrared spectrum of the compound with the mass spectrum shown below lacks any significant absorption above 3000 cm-1. There is a distinct peak near 1740 cm-1 and another strong peak near 1200 cm-1. molecular ion: M* = 102. Relative Abundance (%) 100 90 80 70 60 50 40 30 20 10 20 30 40 50 m/z 60 80 8 100

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Q: 100 50 0 -50 -100 55 14-0 130 8- -2 -60 50 8- -20 115 8

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.