Hydrogen ions, translational energy

Electron-Ion and Ion-Ion Recombination Processes, M. R. Flannery Studies of State-Selective Electron Capture in Atomic Hydrogen by Translational Energy Spectroscopy, H. B. Gilbody Relativistic Electronic Structure of Atoms and Molecules, I. P. Grant The Chemistry of Stellar Environments,... 

We also observe other effects of translational energy in methane which are similar to those found in hydrogen. There is an abstraction reaction for parent ions which also produces a hydronated methane. In studying the reaction... 

The study of (C3H7)+ losing H2 found the transition state to be cyclic, (CH2CH2CH3)+, with both of the hydrogen atoms to be eliminated attached to the same (penta-coordinated) carbon atom [744]. The loss of H2 from the transition state resembled a 1, 1 elimination this decomposition has been observed to release most of its reverse critical energy as translational energy. This paper also contains a careful examination of the isotope effects /Hj //Hd/ d2 on metastable ion abundances. 

The activation of intramolecular carbon-hydrogen bonds by metal ions in the gas phase first involves tt-coordination, followed by remote functionalization of C—H or C—C several carbons distant from the initial coordination site. Schwarz has reviewed his prolithic work in this area. High-resolution translational energy loss measurements on the remote functionalization of internal alkynes by Cr" have been made. These indicate that the ions involved are in the ground state and that no added collisional energy transfer is needed for cyclometallation to proceed. The reactions of Fe", Co", and/or Ni" have been studied with alkyl-substituted amines, " alcohols, ketones, nitriles, " ... 

A model of the ATP synthase, the effector of the chemiosmotic mechanism. A potential and a hydrogen ion gradient is created across the inner membrane of mitochondria, bacteria, and chloroplasts by redox reactions. The energy of this proton motive force is translated into ATP synthesis by rotation of the cluster of c subunits of the F , and this rotation is transmitted via the y stalk to the a-B trimers of the F, complex. The catalytic complex contains three a-6 trimers that rotate with transmission of hydronium ions inward through the c subunit complex of the Fo sector. The two b subunits tether the a-6 trimers via the 6 subunit, and the a subunit is fixed, allowing rotation of the c complex, thus rotating the y stalk. 

Abstract. Cross sections for electron transfer in collisions of atomic hydrogen with fully stripped carbon ions are studied for impact energies from 0.1 to 500 keV/u. A semi-classical close-coupling approach is used within the impact parameter approximation. To solve the time-dependent Schrodinger equation the electronic wave function is expanded on a two-center atomic state basis set. The projectile states are modified by translational factors to take into account the relative motion of the two centers. For the processes C6++H(1.s) —> C5+ (nlm) + H+, we present shell-selective electron transfer cross sections, based on computations performed with an expansion spanning all states ofC5+( =l-6) shells and the H(ls) state. 

---