INC-04
                    d/f-Block & Coordination
                            │
        ┌───────────────────┼───────────────────┐
        │                   │                   │
   d-Block               f-Block          Coordination
   Elements             Elements           Compounds
        │                   │                   │
   ┌────┴────┐         ┌────┴────┐        ┌─────┴─────┐
   │         │         │         │        │           │
Config    Properties  Lanthanoids Actinoids Structure  Theory
Anomalies    │         │         │        │           │
   │     ┌──┴──┐   Contraction  All    Werner      VBT│CFT
  Cr     │     │     → Zr/Hf  Radioac  Theory         │
  Cu   Variable Color  similar   tive  Primary/   Spec-
       OS   Ions   Size               Secondary  troch-
         │         │                  Valence    emical
       Para-    Catalyst               │         Series
       magnet   Fe/V/Mn            Ligands       │
                                       │       $\Delta o$ & $\Delta t$
                               Monodentate   High/Low
                               Bidentate     Spin
                               EDTA (hexa)   Colour
                               Ambidentate   Magnetism
                                   │
                               Isomerism
                                   │
                        ┌──────────┼──────────┐
                        │          │           │
                   Geometrical  Optical    Linkage &
                   (cis/trans)  (mirror     Ionisation
                                images)

Central relationship: Crystal field splitting ($\Delta o$) controls spin state → controls magnetism (μ value) and colour (wavelength absorbed = $\Delta o$). Ligand identity determines $\Delta o$ through the spectrochemical series.