3. Complete the following reaction equations by giving the major produc intermediates and relevant stereochemistry: ? (i) (ii) (iii) H3C H3C Br H3O+ 1.CH3MgBr 2. H3O+ 1. Mg, ether 2. CO2 3. H3O+ 190

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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.