Super hybrid tridentate ligands: 4-substituted-2-(1-butyl-1H-1,2,3-triazol-4-yl)-6-(1H-pyrazol-1-yl)pyridine ligands coordinated to Fe(II) ions display above room temperature spin transitions

A series of novel super hybrid tridentate ligands based on (2-(1-butyl-1H-1,2,3-triazol-4-yl)-6-(1H-pyrazol-1-yl)pyridine (tpp) derivatives were synthesized. Their Fe(II) complexes display around (T 1/2 = 287 K) and above room temperature (T 1/2 >> 375 K) spin transition temperatures.