2564-86-5Relevant articles and documents
Formation of Glyoxylic Acid in Interstellar Ices: A Key Entry Point for Prebiotic Chemistry
Eckhardt, André K.,Bergantini, Alexandre,Singh, Santosh K.,Schreiner, Peter R.,Kaiser, Ralf I.
supporting information, p. 5663 - 5667 (2019/03/29)
With nearly 200 molecules detected in interstellar and circumstellar environments, the identification of the biologically relevant α-keto carboxylic acid, glyoxylic acid (HCOCOOH), is still elusive. Herein, the formation of glyoxylic acid via cosmic-ray driven, non-equilibrium chemistry in polar interstellar ices of carbon monoxide (CO) and water (H2O) at 5 K via barrierless recombination of formyl (HCO) and hydroxycarbonyl radicals (HOCO) is reported. In temperature-programmed desorption experiments, the subliming neutral molecules were selectively photoionized and identified based on the ionization energy and distinct mass-to-charge ratios in combination with isotopically labeled experiments exploiting reflectron time-of-flight mass spectrometry. These studies unravel a key reaction path to glyoxylic acid, an organic molecule formed in interstellar ices before subliming in star-forming regions like SgrB2(N), thus providing a critical entry point to prebiotic organic synthesis.
Experimental Study and Kinetic Modeling of Propene Oxidation in a Jet Stirred Flow Reactor
Dagaut, P.,Cathonnet, M.,Boettner J. C.
, p. 661 - 671 (2007/10/02)
The oxidation of propene was studied in a jet stirred flow reactor in the temperature range 900-1200 K at pressures extending from 1 to 8 atm for a wide range of fuel-oxygen equivalence ratios (0.15-4.0).A computer program has been developed to model the experimental data by using a chemical kinetic reaction mechanism.A direct method to determine the first-order sensitivities of the mole fraction of each species with respect to the rate constants was used to develop the kinetic scheme.The present chemical kinetic reaction mechanism is able to reproduce the experimental results, although some discrepancies are observed for the minor products.
