Hydrogen atom tunneling in the thermal tautomerism of porphine imbedded in a n-hexane matrix

Journal Article · Tue Dec 06 23:00:00 EST 1988 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00233a009· OSTI ID:5117365

Butenhoff, T J; Moore, C B ^[1]

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1. Univ. of California, Berkeley (USA)

Rate constants and the kinetic isotope effect for the tautomerization of pophine imbedded in a n-hexane Shpol'skii matrix near 110 K have been measured with laser-induced fluorescence spectroscopy. A one-dimensional tunneling model calculation has been used to compare the feasibility of the synchronous and asynchronous hydrogen migration mechanisms. Only the asynchronous tunneling model is consistent with the rate constants and kinetic isotope effects measured near 110 K and near room temperature. 22 refs., 7 figs.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5117365
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 110:25; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
ALKANES
ATOMS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
DATA
DEUTERIUM
ELEMENTS
EXPERIMENTAL DATA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HEXANE
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
INFORMATION
ISOMERIZATION
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
MATERIALS
MATRIX MATERIALS
MIGRATION
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PORPHYRINS
STABLE ISOTOPES