[3] Metal Ligand Bonding In Transition Metal Complexes | Inorganic chemistry | BSc 3rd Year

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For Bsc 3rd year students

In Chemistry, a metal–ligand multiple bond describes the interaction of certain ligands with a metal with a bond order greater than one.Coordination complexes featuring multiply bonded ligands are of both scholarly and practical interest. Transition metal carbene complexes catalyze the olefin metathesis reaction. 

The striking colors exhibited by transition-metal complexes are caused by excitation of an electron from a lower-energy d orbital to a higher-energy d orbital, which is called a d–d transition (Figure 24.7.424.7.4). For a photon to effect such a transition, its energy must be equal to the difference in energy between the two d orbitals, which depends on the magnitude of Δo.
Color Depends on Oxidation State

Small changes in the relative energies of the orbitals that electrons are transitioning between can lead to drastic shifts in the color of light absorbed. Therefore, the colors of coordination compounds depend on many factors. As shown in Figure 24.7.424.7.4, different aqueous metal ions can have different colors. In addition, different oxidation states of one metal can produce different colors.

Color Depends on Ligand Field

The specific ligands coordinated to the metal center also influence the color of coordination complexes. Because the energy of a photon of light is inversely proportional to its wavelength, the color of a complex depends on the magnitude of Δo, which depends on the structure of the complex. 

video parts
part 1
   • [1] Metal Ligand Bonding In Transitio...  

part 2
   • [2] Metal Ligand Bonding In Transitio...  
part 3
   • [3] Metal Ligand Bonding In Transitio...   ( you are watching)

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