• Most d- T-Metal
ions have vacant d-orbitals that can accept a share of an electron pair, and as a
result many act as Lewis acids by forming coordinate-covalent
bonds.
• The bonding in metal complexes can be simplified to say that most T-Metal
ions are potential Lewis acids and most ligands are potential
Lewis bases.
• Accordingly,
metal complexes are often called coordination
compounds as they
contain coordinate-covalent
bonds.