ESR study of reduced mixed ligand complexes: 2,2'-bipyrimidine complexes with ruthenium(II)
The ESR spectra of reduced RuL/sub 3//sup n+/ complexes (L = 2,2'-bipyrimidine (bpm)) containing one and two redox electrons give an S = 1/2 spectrum that produces temperature-dependent line broadening, while the three-electron product, (Ru(bpm)/sub 3/)/sup -/, does not give line broadening. Reduced mixed ligand complexes such as (Ru(bpy)/sub 2/(bpm/sup -/))/sup +/ produced hyperfine structure (hfs) associated with the bpm ligand. The hfs of the one-electron-reduced dimer (Ru(bpy)/sub 2/(bpm/sup -9/)/sup +/ species as well as the hfs of reduced free ligand bpm produces spin densities in the bpm that are consistent with intuition. A comparison of the charge localization and electron-transfer process in these and other mixed valent metal complexes is presented.
- Research Organization:
- North Carolina State Univ., Raleigh
- OSTI ID:
- 6091152
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:18; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
AZINES
BIPYRIDINES
CHEMICAL REACTIONS
COMPLEXES
DATA
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
LIGANDS
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
REDUCTION
RESONANCE
RUTHENIUM COMPLEXES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES
VOLTAMETRY