- Bioconversion of D-glucose in heavy water: Effect of water isotopomeric composition on deuterium fragment distribution in ethanol
-
The relative distribution of deuterium between methyl and methylene groups in ethanol at the bioconversion of D-glucose in heavy water was studied.
- Sakhabutdinov,Bisikalo,Kushnarev,Rokhin,Kulagina
-
experimental part
p. 2058 - 2061
(2011/05/07)
-
- Formation of Ketone Ions Upon the Loss of CH2O from Ionized Esters
-
Unimolecular and collision-induced decomposition of the products of CH2O loss from propyl propanoate and butyl butanoate demonstrate that the respective products are the 3-pentanone and 4-heptanone ions.
- Lin, Thomas,Hudson, Charles E.,McAdoo, David J.
-
-
- Metastable Decompositions of C5H10O+. Ions with the Oxygen on the Middle Carbon: A Test for Energy Randomization
-
This study was undertaken to define the mechanisms of metastable decomposition of C5H10O+. ions with the oxygen on the middle carbon, and to test the assumption that internal energy becomes randomly distributed prior to the unimolecular decompositions of gaseous ions.CH3CH2C(=OH+)CH2CH2. (2), CH3CH2C(=OH+).CHCH3 (3), and CH3CH2C(OH+.)HCH=CH2 (4) all rearrange to CH3CH2C(=O+.)CH2CH3 (1) prior to metastable decomposition.However, 2 - 4 lose ethyl 50 - 100 times as often as they lose ethane following rearrangement to 1, while 1 formed by ionization of 3-pentanone loses exclusively ethane.These differences are attributed to excess energy in the isomerized ions. 3-Pentanone ions formed by isomerization of 2 - 4 lose ethyl and ethane from opposite sides at unequal rates, possibly owing to incomplete randomization of energy following isomerization.
- McAdoo, David J.,Farr, William,Hudson, Charles E.
-
p. 5165 - 5169
(2007/10/02)
-