Wow, those spectra claim to be older than I am!
My best guess is that what you have is 3-phenylpropanoic acid. You lost the chlorine somewhere. Was this a hydrogenation?
Most of the fragments don't have chlorine (judging by M+2 peak intensity).
The fragment at 150 is 3-phenylpropanoic acid minus a hydrogen atom.
The fragment at 91 is C6H5-CH2.
If you had a chlorine still, you would expect to see a fragment at 125 and M+2 at 127, for C6H4Cl-CH2. This is present in the bottom spectrum but not
the top one. The lack of a parent ion around 184 is another clue.
Can you also post the NMR data?
[Edited on 2021-3-8 by Metacelsus] |