[annier235]

I am really struggling with all parts of this question! If someone can work it out, it would be of great *delete me* I need the answers in 10 hours!



1. (i) Use group theory to predict the number of (CO) stretching
vibrations you would expect to observe in the IR and Raman
spectra of all sensible isomers of Fe(CO)4(PPh3).
(10 marks)

(ii) Can these isomers be differentiated by IR and/or 13C {
1H}
spectroscopy at room temperature? Fully explain your answer in
both cases.
(10 marks)

(iii) Fe(CO)5 is relatively unstable and upon standing converts into
a green solid. What is the latter? Give a balanced equation.
Would you expect to be able to differentiate between these two
iron carbonyls on the basis of IR spectroscopy? (you do not need
to give a full group theory analysis)
(5 marks)

(iv) Explain why Fe(CO)4(PPh3) does not decompose in a similar
manner but is sensitive to oxidative decay.
(5 marks)

[Corribus]

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