[PAR] [TLE] Crystal field theory [SEP] Crystal Field Theory (CFT) is a model that describes the breaking of degeneracies of electron orbital states, usually d or f orbitals, due to a static electric field produced by a surrounding charge distribution (anion neighbors).  This theory has been used to describe various spectroscopies of transition metal coordination complexes, in particular optical spectra (colors).  CFT successfully accounts for some magnetic properties, colours, hydration enthalpies, and spinel structures of transition metal complexes, but it does not attempt to describe bonding.  CFT was developed by physicists Hans Bethe and John Hasbrouck van Vleck in the 1930s.  CFT was subsequently combined with molecular orbital theory to form the more realistic and complex ligand field theory (LFT), which delivers insight into the process of chemical bonding in transition metal complexes. [PAR] [TLE] Hans Bethe [SEP] Hans Albrecht Bethe (] ; July 2, 1906 – March 6, 2005) was a German and American nuclear physicist who, in addition to making important contributions to astrophysics, quantum electrodynamics and solid-state physics, won the 1967 Nobel Prize in Physics for his work on the theory of stellar nucleosynthesis.
[PAR] [TLE] Crystal field theory [ SEP ] Crystal Field Theory ( CFT ) is a model that describes the breaking of degeneracies of electron orbital states , usually d or f orbitals , due to a static electric field produced by a surrounding charge distribution ( anion neighbors ) . This theory has been used to describe various spectroscopies of transition metal coordination complexes , in particular optical spectra ( colors ) . CFT successfully accounts for some magnetic properties , colours , hydration enthalpies , and spinel structures of transition metal complexes , but it does not attempt to describe bonding . CFT was developed by physicists Hans Bethe and John Hasbrouck van Vleck in the 1930s . CFT was subsequently combined with molecular orbital theory to form the more realistic and complex ligand field theory ( LFT ) , which delivers insight into the process of chemical bonding in transition metal complexes . [PAR] [TLE] Hans Bethe [ SEP ] Hans Albrecht Bethe ( ] ; July 2 , 1906 – March 6 , 2005 ) was a German and American nuclear physicist who , in addition to making important contributions to astrophysics , quantum electrodynamics and solid - state physics , won the 1967 Nobel Prize in Physics for his work on the theory of stellar nucleosynthesis .
When did the person that helped van Vleck develop CFT die?
When did the person that helped van Vleck develop CFT die ?
March 6, 2005
March 6, 2005