Answer: Some metal complexes have a coordination number of

Chapter , Problem 76AE

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Some metal complexes have a coordination number of 5. One such complex is \(\mathrm{Fe}(\mathrm{CO})_{5}\), which adopts a trigonal bipyramidal geometry (see Figure 9.8). (a) Write the name for \(\mathrm{Fe}(\mathrm{CO})_{5}\), using the nomenclature rules for coordination compounds. (b) What is the oxidation state of Fe in this compound? (c) Suppose one of the CO ligands is replaced with a \(C N^{-}\) ligand, forming \(\left[\mathrm{Fe}(\mathrm{CO})_{4}(\mathrm{CN})\right]^{-}\). How many geometric isomers would you predict this complex could have?

What is the bond angle formed by an axial atom, the central atom, and any equatorial atom?

▲ Figure 9.8 In a trigonal-bipyramidal geometry, there are two types of positions for the outer atoms.

Equation transcription:

Text transcription:

{Fe}({CO})_{5}

[{Fe}({CO})_{4}({CN})]^{-}

C N^{-}