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Mechanism from Isotope Effects
Isotopes in Environmental and Health Studies, 1998Abstract Isotope effects represent perhaps one of the most versatile tools available to investigators interested in the determination of reaction mechanism, particularly in the case of the mechanistic enzymologist. Interpretation of isotope effect data is somewhat more difficult for enzyme reactions, since the chemical or isotope-dependent step(s) is(
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Mass-Independent Isotope Effects
The Journal of Physical Chemistry B, 2013Three fundamental properties of atomic nuclei-mass, spin (and related magnetic moment), and volume-are the source of isotope effects. The mostly deserved and popular, with almost hundred-year history, is the mass-dependent isotope effect. The first mass-independent isotope effect which chemically discriminates isotopes by their nuclear spins and ...
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Isotope Effect and Isotope Separation: A Chemist's View.
Journal of Nuclear Science and Technology, 2002What causes the isotope effects (IE)? This presentation will be centered around the equilibrium isotope effects due to the differences in the nuclear masses. The occurrence of the equilibrium constant, K, of isotope exchange reactions which differ from the values predicted by the classical theory of statistical mechanics, Kcl , is explored.
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Theoretical and Experimental Chemistry, 1995
The electron spin selectivity of radical reactions is accompanied by nuclear spin selectivity, i.e., sorting of the isotopic nuclei relative to their magnetic moment. This property of spin-selective reactions produces separation of magnetic and nonmagnetic isotopes known as the magnetic isotope effect.
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The electron spin selectivity of radical reactions is accompanied by nuclear spin selectivity, i.e., sorting of the isotopic nuclei relative to their magnetic moment. This property of spin-selective reactions produces separation of magnetic and nonmagnetic isotopes known as the magnetic isotope effect.
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Annual Review of Physical Chemistry, 1973
Significant theoretical and experimental advances during the past three years in the area of equilibrium isotope effects are reviewed. Section headings are: isotope separation; chemical exchange equilibria: theory; calculations of reduced partition function ratios; chemical exchange equilibria: experimental; solvent isotope effects; isotope effects in ...
J Bigeleisen, M W Lee, F Mandel
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Significant theoretical and experimental advances during the past three years in the area of equilibrium isotope effects are reviewed. Section headings are: isotope separation; chemical exchange equilibria: theory; calculations of reduced partition function ratios; chemical exchange equilibria: experimental; solvent isotope effects; isotope effects in ...
J Bigeleisen, M W Lee, F Mandel
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1975
This chapter considers hydrogen isotope effects upon rates of proton transfer for reactions in solution not involving solvent isotope effects. Practically speaking, examples are confined to proton transfer to or from carbon, and the point of view most commonly apparent in experimental investigations is that of an organic chemist interested in ...
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This chapter considers hydrogen isotope effects upon rates of proton transfer for reactions in solution not involving solvent isotope effects. Practically speaking, examples are confined to proton transfer to or from carbon, and the point of view most commonly apparent in experimental investigations is that of an organic chemist interested in ...
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1975
The substitution of D for H is an elegant probe to use in the elucidation of chemical dynamics, and in particular the solvent isotope effect is a powerful technique for investigating the role of the solvent. This will be the main theme of this chapter. When H2O is replaced by D2O it is inevitable that we are dealing with the effects of substitution at ...
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The substitution of D for H is an elegant probe to use in the elucidation of chemical dynamics, and in particular the solvent isotope effect is a powerful technique for investigating the role of the solvent. This will be the main theme of this chapter. When H2O is replaced by D2O it is inevitable that we are dealing with the effects of substitution at ...
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