Nuclear magnetic resonance studies of porphyrin .pi.-cation radical in ruthenium(II)-substituted horseradish peroxidase and some implications for the electronic state of peroxidase compound I

Biochemistry ◽  
1986 ◽  
Vol 25 (12) ◽  
pp. 3576-3584 ◽  
Author(s):  
Isao Morishima ◽  
Yoshitsugu Shiro ◽  
Keizo Nakajima
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Horseradish Peroxidase ◽  
Electronic State ◽  
Cation Radical ◽  
Compound I ◽  
Magnetic Resonance Studies ◽  
Nuclear Magnetic

Solid-state 207Pb nuclear magnetic resonance studies of adducts of 1,10-phenanthroline with lead(II) halides

2011 ◽  
Vol 89 (7) ◽  
pp. 863-869 ◽  
Author(s):  
Alicia Glatfelter ◽  
Shi Bai ◽  
Olga Dmitrenko ◽  
Dale L. Perry ◽  
Scott E. Van Bramer ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Electronic State ◽  
Coordination Complexes ◽  
Magnetic Resonance Studies ◽  
Nmr Parameters ◽  
State Coordination ◽  
Chemical Shieldings ◽  
Nuclear Magnetic

Experimental and predicted 207Pb nuclear magnetic resonance (NMR) parameters of solid-state coordination complexes of lead(II) bromide, lead(II) iodide, and lead(II) chloride with 1,10-phenanthroline are reported. Structural and electronic differences between the 1:1 and 1:2 adducts are reflected by the NMR parameters. The NMR chemical shieldings of the isostructural complexes indicate that the electronic state of the lead(II) center depends on the number of ligands and the halogen anion. The NMR results suggest that the 1:2 adduct may be more stereochemically active than the 1:1 adduct.

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