Kinetics of tautomerism in 2-substituted 5,10,15,20-tetraphenylporphyrins: directionality of proton transfer between the inner nitrogens
Journal Article
·
· J. Am. Chem. Soc.; (United States)
This paper describes a study of the kinetics of proton transfer in 2-substituted 5,10,15,20-tetraphenylporphyrins. Variable-temperature NMR studies on 16 2-substituted porphyrins showed that the position of the tautomeric equilibrium is altered by the substituent and that the tautomerism can be readily monitored by variable-temperature NMR spectroscopy. Activation parameters for the tautomerism were determined by saturation transfer experiments and line shape analysis and compared to the values reported for the unsubstituted 5,10,15,20-tetraphenylporphyrin.
- Research Organization:
- Univ. of Sydney, Australia
- OSTI ID:
- 6542443
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:8; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY
EXPERIMENTAL DATA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN TRANSFER
INFORMATION
ISOMERIZATION
KINETICS
MAGNETIC RESONANCE
NITROGEN
NMR SPECTRA
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PORPHYRINS
REACTION KINETICS
RESONANCE
SPECTRA
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY
EXPERIMENTAL DATA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN TRANSFER
INFORMATION
ISOMERIZATION
KINETICS
MAGNETIC RESONANCE
NITROGEN
NMR SPECTRA
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PORPHYRINS
REACTION KINETICS
RESONANCE
SPECTRA
THERMODYNAMIC PROPERTIES
THERMODYNAMICS