The following Grignard reaction gave I as a major product. The mass spectrum of H is given below. Note that the molecular ion at m/z 88 is not detected in the spectrum. Determine the structure of I. Explain your answer.

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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.