The stable-hydrogen kinetic isotope effects (KIEs) for a series of n-alkanes in reaction with chlorine atoms in the gas phase were studied in a 25-L PTFE reaction chamber at 298 K. The time dependence of both the stable hydrogen isotope ratios and the concentrations was determined using a ...
结果1 题目 29 Deuterium, D, is the H isotope of hydrogen. DBr has the same chemical properties as HBr.Which compounds could be made by the reaction of DBr with another compound in a single reaction?B1 Br D2CHBr2CHDBr3CH3CHBr(OD) 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
The hydrogen isotope deuterium is widely used in the synthesis of isotopically-labeled compounds and in the fabrication of semiconductors and optical fibers. However, the facile production of deuterium gas (D2) and hydrogen deuteride (HD) in a controlled
It was established that isotope exchange take place during the copolymerization of ethylene with propylene under the influence of the catalytic system based on ( π -C 3 H 5 NiBr) 2 . It was shown that the kinetic isotope effect is absent....
n20220* --chemistry--inorganic, organic, & physical chemistry--isotopic effects chemical reactions deuterium heavy water isotopic exchange reaction kinetics temperature water deuterium hydrides/hd--h$sub 2$o, deuterium equilibria in, constants for deuterium/equilibrium in hydrogen--water system water-d...
An experimental search for the superheavy hydrogen isotope 6 H was conducted through studying the absorption of stopped π -mesons by 9 Be and 11 B nuclei. A structure in the missing mass spectrum caused by the resonance states of 6 H was observed in three reaction channels, namely, 9 Be...
The existence of oxonium radicals on the microsecond time scale has been up for much debate, and strong isotope effects have been reported. Here we show that H 3O, H 2DO, HD 2O, and D 3O all have subnanosecond lifetimes when they are formed in charge-transfer collisions between oxonium...
Hydrogen isotope values (dD) of sedimentary terrestrial leaf wax such as n-alkanes or n-acids have been used to map and understand past changes in rainfall amount in the tropics because dD of precipitation is commonly assumed as the first order controlling factor of leaf wax dD. Plant function...
The time scales and formation mechanisms of tri-hydrogen cation products in organic molecule ionization processes are poorly understood, despite their cardinal role in the chemistry of the interstellar medium and in other chemical systems. Using an ultrafast extreme-ultraviolet pump and time-resolved nea...
Palmitic acid (PA) is the most common fatty acid in humans and mediates palmitoylation through its conversion into palmitoyl coenzyme A. Although palmitoylation affects many proteins, its pathophysiological functions are only partially understood. Here w