STUDIES INVOLVING ISOTOPICALLY LABELLED FORMIC ACID AND ITS DERIVATIVES. II. RELATION OF THE ABSOLUTE REACTION RATES TO THE MAGNITUDES OF THE ISOTOPE EFFECTS IN THE OXIDATION OF FORMIC-C*SUP 13/ ACID BY HALOGEN ATOMS

Journal Article · Fri Sep 20 00:00:00 EDT 1957 · Journal of the American Chemical Society (U.S.)

DOI:https://doi.org/10.1021/ja01575a031· OSTI ID:4312676

Ropp, G A; Danby, C J; Dominey, D A

For two reactions of formic-C/sup 13/ acid in which the rate steps involve extraction of hydrogen by halogen atoms, the rate isotope effects, k/sub 12//k/syb 13/, have been carefully evaluated by methods involving mass spectrometric analysis of carbon-13 dioxide. The difference between the measured values of k/sub 12//k/sub 13/ for the two reactions has been found to be in the direction that the slower reaction shows the greater degree of isotope fractionation. This principle which has also been noted in earlier studies is discussed in terms of the possible residual carbon-to-hydrogen bonding to be expected in the activated states for the two reactions. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.; Oxford Univ., Eng.
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-000073
• OSTI ID: 4312676
• Journal Information: Journal of the American Chemical Society (U.S.), Vol. Vol: 79; Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ACTIVATION ANALYSIS
ATOMS
BONDING
CARBON 13
CHEMICAL REACTIONS
FORMIC ACID
HALOGENS
HYDROGEN
ISOTOPE EFFECTS
ISOTOPES
LABELLED COMPOUNDS
MASS SPECTROMETERS
OXIDATION
QUALITATIVE ANALYSIS
SOLVENT EXTRACTION