Hi
The photolysis of Fe(CO) gives Fe(CO)5 . This is dissolved in heptane and then exposed to the radiations. The spectra of CO which is 1790 cm-1 leads to the conclusion of imortant results like the formation of
Fe(CO)4 and Fe(CO)3 .
It shows How Fe(CO)5 loses two CO groups by radiating one photon etc.
Cheers!