Fingerprinting Kinetic Isotope Effects and Diagenetic Exchange Reactions Using Fluid Inclusion and Dual‐Clumped Isotope Analysis
نویسندگان
چکیده
منابع مشابه
Analysis of kinetic isotope effects for nonadiabatic reactions.
Factors influencing the rates of quantum mechanical particle transfer reactions in many-body systems are discussed. The investigations are carried out on a simple model for a proton transfer reaction that captures generic features seen in more realistic models of condensed phase systems. The model involves a bistable quantum oscillator coupled to a one-dimensional double-well reaction coordinat...
متن کاملKinetic isotope effects for fast deuterium and proton exchange rates.
By monitoring the effect of deuterium decoupling on the decay of transverse (15)N magnetization in D-(15)N spin pairs during multiple-refocusing echo sequences, we have determined fast D-D exchange rates kD and compared them with fast H-H exchange rates kH in tryptophan to determine the kinetic isotope effect as a function of pH and temperature.
متن کاملKinetic isotope effects
Kinetic isotope effects (KIEs) [9] are the effects on chemical reaction rates caused by isotopic substitution in the reacting system. KIEs report on bonding changes to the isotopic atom(s) when going from reactant state to transition state (TS). KIE studies are therefore of great use in solving mechanistic problems such as: (i) concerted or stepwise reaction? (ii) which is the rate limiting ste...
متن کاملKinetic isotope effects of
Methane is the second most important long-lived greenhouse gas and plays a central role in the chemistry of the Earth’s atmosphere. Nonetheless there are significant uncertainties in its source budget. Analysis of the isotopic composition of atmospheric methane, including the doubly substituted species CH3D, offers new insight into the methane budget as the sources and sinks have distinct isoto...
متن کاملDeuterium kinetic isotope effects in microsolvated gas-phase E2 reactions.
This work describes the first experimental studies of deuterium kinetic isotope effects (KIEs) for the gas-phase E2 reactions of microsolvated systems. The reactions of F(-)(H(2)O)(n) and OH(-)(H(2)O)(n), where n = 0, 1, with (CH(3))(3)CX (X = Cl, Br), as well as the deuterated analogs of the ionic and neutral reactants, were studied utilizing the flowing afterglow-selected ion flow tube techni...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geochemistry Geophysics Geosystems
سال: 2023
ISSN: ['1525-2027']
DOI: https://doi.org/10.1029/2022gc010766