[Shing]

I have to predict the fragments expected in the mass spectra  of
                     
                        O     
                        ||     
   BENZENE RING--C---CH2---CH3
                                 
and show their m/z values. 
Any thoughts on how i should start?

Thanks

[cliverlong]

I have to predict the fragments expected in the mass spectra  of
                     

Any thoughts on how i should start?

Thanks

http://www.chemguide.co.uk/analysis/masspec/fragment.html#top
http://www.chemguide.co.uk/analysis/masspec/mplus.html#top