Physical Sciences and Mathematics Commons^™

Investigation Of The Axial Binding Of Phosphrus (Sic) Ligands To Tetraphenylporphinato Iron (Ii), Donghui Cui

FIU Electronic Theses and Dissertations

Phosphines and phosphites have been investigated as ligands to tetraphenylporphinato iron(II) (FeTPP) by spectrophotometric titration in tetrahydrofuran. A least squares method for determination of the equilibrium constants K₁ and K₂ (K₁ and K₂ correspond to the sequential binding constants for the formation of FeTPPL and FeTPPL₂, respectively) was developed. This method eliminates the errors associated with fundamental assumptions intrinsic to the more conventional Hill plot. The visible spectrum of the 5-coordinate complex, FeTPPL, was also determined for each ligand. The equilibrium constants obtained are: {L(logK₁, logK ₂)}, PMe₃ (5.53, 4.60); …