Pi - Complex MCQ - Practice Questions with Answers

These are the compounds of metals with alkenes, alkynes, benzene and other ring compounds. In these complexes, the metal and ligand form a bond that involves the π elements, the metal and ligand form a bond that involves the π electrons of the ligand. Three common examples are Zeise's salt, ferrocene and dibenzene chromium. These are shown in the figure below:

                Zeise' salt                                       Ferrocene                 Dibenzene chromium

The number of carbon atoms bound to the metal in these compounds is indicated by the Greek letter 'η' with a number. The prefixes η², η⁵ and η⁶ indicate 2, 5 and 6 carbon atoms are bound to the metal in the compound.