Question

Consider the trigonal bipyramidal tungsten complex: [W(CO)3(PMe3)2]
(i) Draw the structure of the cis- and trans-isomers.
(ii) Discuss how you would use NMR to distinguish between the isomers.
(iii) Discuss how you would use IR spectroscopy to distinguish between the isomers.
(iv) Explain how the IR spectrum (CO region) would change if the PMe3 ligands were replaced with PF3 ligands.
(Illustrate your answer with suitable diagrams)