Autor: |
Benjamin Shepler, Joseph C. Sloop, Mithra Beikmohamadi Marcus, David A. Shultz |
Rok vydání: |
2011 |
Předmět: |
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Zdroj: |
Journal of Physical Organic Chemistry. 25:101-109 |
ISSN: |
0894-3230 |
DOI: |
10.1002/poc.1878 |
Popis: |
Linear free-energy relationships for a series of functionalized semiquinone ligands and their MnII- and CuIIhydro-tris(3-cumenyl-5-methylpyrazolyl) borate complexes were examined. Quinone–semiquinone cycle half-wave reduction potentials and semiquinone hydrogen hyperfine coupling constants (aH) were determined and their correlation with Hammett σ parameters reported. A new σ parameter, σaH, has been proposed. MnII and CuII metal complex metal–ligand charge transfer and n π* UV transitions were found to be modulated by substituents. Satisfactory Hammett correlations between UV transitions and various σ values have been determined and compared in a number of instances. Copyright © 2011 John Wiley & Sons, Ltd. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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