File:Chapter-26 Cordination Chemistry - Crystal Field Theory (CFT) pp 209-220.pdf

CFT was developed by physicists Hans Bethe and John Hasbrouck van Vleck in the 1930s. In this chapter, mnemonically, I have discussed the electronic configuration of coordination complexes in the light of CFT, their magnetic moments, and their spin state. Spin multiplicity value should be calculated innovatively by using the formula (n+1). Factors affecting the Crystal field splitting energy of different coordination compounds having CN=4 and CN=6 have also been discussed. Different examples have highlighted the relationship between pairing energy (P) and Crystal field splitting energy (∆) for a high spin and low spin coordination complexes. How the wavelength (λ) of light absorbed by the coordination complexes is closely related to its Crystal Field Splitting Energy has also been conversed here. The relation between the enthalpy of atomization and the number of unpaired electrons in the metal atom has also been discussed in the 10th problem at the end of this chapter.