can somebody help me from where will i get the complete information about werner's thoery???

Question

and what is crystal field theory????????????

Answer 1

Crystal field theory (CFT) is a model that describes the electronic structure of transition metal compounds, all of which can be considered coordination complexes. CFT successfully accounts for some magnetic properties, colours, hydration enthalpies, and spinel structures of transition metal complexes. It does not attempt to describe bonding. CFT was developed by physicists Hans Bethe and John Hasbrouck van Vleck. CFT was subsequently combined with molecular orbital theory to form ligand field theory (LFT), which delivers insight into the process of chemical bonding in transition metal complexes. CFT is considered to be a stepping stone to appreciating LFT.

In CFT, the metal complex is treated as a "free ion". The ligands are treated as point charges. It is assumed that the orbitals on the metal and the ligands do not overlap. In the more refined LFT model, metal-ligand bonding is quantified using an empirical constant called the Racah parameter. Overall the transition from CFT to LFT is one from electrostatic model to a more realistic (and more complicated) polar-covalent model for metal-ligand interactions.