271765-23-2Relevant academic research and scientific papers
Direct observation of conformers caused by the difference in ligand orientation in low spin iron(III) porphyrin complex
Ikeue, Takahisa,Yamaguchi, Tatsuya,Ohgo, Yoshiki,Nakamura, Mikio
, p. 342 - 343 (2000)
EPR spectrum of low spin bis(dimethylaminopyridine)(3,8, 13,18-tetramesityl-2,7,12,17-tetramethylporphyrinato)iron(III) perchlorate taken in frozen CH2Cl2 solution at 4.2 K showed both large gmax and rhombic type signals.
Saddle-shaped six-coordinate iron(III) porphyrin complexes showing a novel spin crossover between S = 1/2 and S = 3/2 spin states
Ikeue, Takahisa,Ohgo, Yoshiki,Yamaguchi, Tatsuya,Takahashi, Masashi,Takeda, Masuo,Nakamura, Mikio
, p. 2617 - 2620 (2007/10/03)
The field strength of the axial ligands determines the spin state of saddled iron(III) porphyrin complexes (see picture). Strong axial ligands (L), such as imidazole and 4-dimethylaminopyridine, lead to the formation of complexes with a pure S = 1/2 state, while weak ligands, such as THF, give complexes with a pure S = 3/2 state. Intermediate strength ligands, such as pyridine and 4-cyanopyridine, give complexes that show a novel spin crossover between the S = 1/2 and S = 3/2 states.
