Under EI conditions, the respective characteristic fragment ions of

question 1

chlorobenzene and anisole [C6H5OCH3] are [M-Cl]+ (with an appearance energy of 13.2 eV) and [M-CH2O]+ (with an appearance energy of 11.3 eV). Draw diagrams to depict the expected approximate appearance of the fragment ion signals in the EI spectrum of 4-chloroanisole [ClC6H4OCH3] recorded separately at each of the following ionising energies.

1 . 14 eV

2 . 70 eV