Document Type
Thesis
Degree
Master of Science (MS)
Major/Program
Chemistry
First Advisor's Name
John T. Landrum
First Advisor's Committee Title
Committee Chair
Second Advisor's Name
Jeffrey Joens
Third Advisor's Name
Ramon Lopez de la Vega
Keywords
Porphyrins, Ligand binding (Biochemistry)
Date of Defense
7-27-1992
Abstract
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); PEt3 (5.61, 4.30); P(n- Bu)3 (6.13, 5.02); P(OEt)3 (3.87, 2.82); P(O-i-Pr)3 (3.28, 1.13). The equilibrium constants are dependent upon steric bulk, σ-basicity and π-acidity.
Identifier
FI14061558
Recommended Citation
Cui, Donghui, "Investigation of the axial binding of phosphrus (sic) ligands to tetraphenylporphinato iron (II)" (1992). FIU Electronic Theses and Dissertations. 2682.
https://digitalcommons.fiu.edu/etd/2682
Rights Statement
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Comments
If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to dcc@fiu.edu and include clear identification of the work, preferably with URL.