Simultaneous Determination of Intermolecular and Intramolecular13C and2H Kinetic Isotope Effects at Natural Abundance

1999 ◽  
Vol 121 (40) ◽  
pp. 9455-9456 ◽  
Author(s):  
Daniel A. Singleton ◽  
Michael J. Szymanski
Keyword(s):  
Simultaneous Determination ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Natural Abundance ◽  
Kinetic Isotope

ChemInform Abstract: PULSE RADIOLYTIC DETERMINATION OF KINETIC ISOTOPE EFFECTS OF THE ADDITION REACTION OF HYDROGEN ATOMS TO ETHYLENE AND PROPENE

1976 ◽  
Vol 7 (12) ◽  
pp. no-no
Author(s):  
D. MIHELCIC ◽  
V. SCHUBERT ◽  
F. HOEFLER ◽  
P. POTZINGER
Keyword(s):  
Addition Reaction ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Hydrogen Atoms ◽  
Kinetic Isotope

NMR study of 13C-kinetic isotope effects at 13C natural abundance to characterize oxidations and an enzyme-catalyzed reduction

2006 ◽  
Vol 47 (24) ◽  
pp. 4045-4049 ◽  
Author(s):  
Lothar Brecker ◽  
Marion F. Kögl ◽  
Catrin E. Tyl ◽  
Regina Kratzer ◽  
Bernd Nidetzky
Keyword(s):  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Natural Abundance ◽  
13C Natural Abundance ◽  
Kinetic Isotope ◽  
Nmr Study

Simultaneous determination of relative and absolute rate constants in racemization studies; applications to kinetic isotope effects

1978 ◽  
Vol 56 (23) ◽  
pp. 2994-2997 ◽  
Author(s):  
Michal Tencer ◽  
Allan R. Stein
Keyword(s):  
Simultaneous Determination ◽  
Rate Constants ◽  
Isotope Effects ◽  
Absolute Rate ◽  
Reaction Conditions ◽  
Kinetic Isotope ◽  
The Times ◽  
Extremum Value ◽  
Rate Ratios

The method reported allows the simultaneous determination of relative and absolute rate constants for two substances in a single kinetic run. The approach is of special interest for kinetic isotope effect determinations where rate ratios are often near one and failure to exactly duplicate reaction conditions can lead to uncertainties in the values calculated from independently measured rate constants. For racemization studies, using two optically active materials with opposite signs of rotation, knowing their initial rotational contribution and having the faster racemizing one in higher concentration, the rates can be calculated if the times required to reach zero net rotation and the extremum value are measured. Other systems to which the method can be extended are suggested.

ChemInform Abstract: Measurement of Deuterium Kinetic Isotope Effects in Organic and Biochemical Reactions by Natural Abundance Deuterium NMR Spectroscopy

ChemInform ◽  
1987 ◽  
Vol 18 (10) ◽  
Author(s):  
R. A. JUN. PASCAL ◽  
M. W. BAUM ◽  
C. K. WAGNER ◽  
L. R. RODGERS ◽  
D.-S. HUANG
Keyword(s):  
Nmr Spectroscopy ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Natural Abundance ◽  
Deuterium Nmr ◽  
Biochemical Reactions ◽  
Kinetic Isotope

QM/MM Determination of Kinetic Isotope Effects for COMT-Catalyzed Methyl Transfer Does Not Support Compression Hypothesis

2004 ◽  
Vol 126 (28) ◽  
pp. 8634-8635 ◽  
Author(s):  
Giuseppe D. Ruggiero ◽  
Ian H. Williams ◽  
Maite Roca ◽  
Vicent Moliner ◽  
Iñaki Tuñón
Keyword(s):  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Kinetic Isotope ◽  
Methyl Transfer
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