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13.2.5 Describe and explain the formation of complexes of d-block elements IB Chemistry

A complex is formed when ligands datively covalently bond to a central transition metal ion (or atom) by donating a pair of electrons. (Regular covalent bonds involve sharing electrons equally from each atom). These ligands may swap with each other, and the complexes will have different colours. Complexes mentioned in this section include [Fe(H2O)6]3+, [Fe(CN)6]3-, [CuCl4]2- and [Ag(NH3)2]+.
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