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	クリスタル場理論	配位子場解析
分野	化学	化学
系統	Process / pipeline	Process / pipeline
提唱年	1929	1960s
提唱者	Hans Bethe	Brian Norman Figgis
種類	Theoretical model	Theoretical model
原典	Bethe, H. (1929). Termaufspaltung in Kristallen. Annalen der Physik, 3(5), 133–208.	Figgis, B. N. (1966). Introduction to Ligand Fields. Interscience Publishers. ISBN: 978-0471257356
別名	CFT, crystal field, ligand field theory	ligand field, LFT, ligand field theory
関連	3	3
概要	Crystal Field Theory (CFT) is a model that explains the electronic structure, color, magnetism, and reactivity of coordination complexes by considering how the electric field created by surrounding ligands perturbs the d-orbitals of a central metal ion. Developed by Hans Bethe in 1929 and refined throughout the 20th century, CFT is one of the most powerful tools for understanding inorganic chemistry.	Ligand Field Theory (LFT) is an advanced model of metal-ligand bonding that combines crystal field theory with molecular orbital theory. Developed systematically by Brian Norman Figgis and others from the 1960s onward, LFT provides quantitative predictions of electronic structure, magnetism, spectra, and reactivity of coordination complexes, bridging the gap between qualitative crystal field arguments and rigorous quantum mechanics.