Bimolecular Reaction Dynamics of Thiophosgene with O(3P) Atoms

1997 ◽  
Vol 101 (46) ◽  
pp. 8587-8592 ◽  
Author(s):  
K. Ravichandran ◽  
Idelisa Ayala ◽  
Yasuyuki Ishikawa ◽  
Brad R. Weiner
Keyword(s):  
Reaction Dynamics ◽  
Bimolecular Reaction

Bimolecular reaction dynamics of Co+(3F4) + acetone reaction in real time

1999 ◽  
Vol 185-187 ◽  
pp. 837-846 ◽  
Author(s):  
Sung Soo Yi ◽  
Emily L. Reichert ◽  
James C. Weisshaar
Keyword(s):  
Real Time ◽  
Reaction Dynamics ◽  
Bimolecular Reaction

scholarly journals Approaching the forbidden fruit of reaction dynamics: Aiming reagent at selected impact parameters

2018 ◽  
Vol 4 (10) ◽  
pp. eaau2821 ◽  
Author(s):  
Kelvin Anggara ◽  
Lydie Leung ◽  
Matthew J. Timm ◽  
Zhixin Hu ◽  
John C. Polanyi
Keyword(s):  
Impact Parameter ◽  
Reaction Dynamics ◽  
Bimolecular Reaction ◽  
Important Variable ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Stationary Target ◽  
Impact Parameters ◽  
Miss Distance ◽  
The Impact

Collision geometry is central to reaction dynamics. An important variable in collision geometry is the miss-distance between molecules, known as the “impact parameter.” This is averaged in gas-phase molecular beam studies. By aligning molecules on a surface prior to electron-induced dissociation, we select impact parameters in subsequent inelastic collisions. Surface-collimated “projectile” molecules, difluorocarbene (CF2), were aimed at stationary “target” molecules characterized by scanning tunneling microscopy (STM), with the observed scattering interpreted by computational molecular dynamics. Selection of impact parameters showed that head-on collisions favored bimolecular reaction, whereas glancing collisions led only to momentum transfer. These collimated projectiles could be aimed at the wide variety of adsorbed targets identifiable by STM, with the selected impact parameter assisting in the identification of the collision geometry required for reaction.

State- and bond-selected photodissociation and bimolecular reaction of water

1990 ◽  
Vol 332 (1625) ◽  
pp. 259-272 ◽  
Keyword(s):  
Room Temperature ◽  
Reaction Dynamics ◽  
Bimolecular Reaction ◽  
Water Molecules ◽  
Vibrational States ◽  
Vibrationally Excited ◽  
Stretching Vibration ◽  
Different Populations ◽  
H 20 ◽  
Selection Of

It is possible to exploit the isolation of the 0 —H stretching vibration in H 20 and HOD to control the photodissociation and reaction dynamics in water molecules excited in the region of the third overtone (4rOH) of the 0 -H stretch. In vibrationally mediated photodissociation of H 20, the selection of different initial stretching states having roughly the same energy leads to drastically different populations of the vibrational states of the OH photolysis product. By exciting the O-H stretching overtone in HOD, we can selectively photolyze that bond. In bimolecular reaction experiments, we react H 20 (4rOH) with H atoms to produce H 2 and OH. The reaction, which is endothermic, proceeds at an undetectable rate in our room temperature measurements. Vibrationally excited water, however, reacts at roughly the gas kinetic collision rate. Applying this technique to HOD (4rOH) allows us to demonstrate bond selected bimolecular chemistry in which the reaction produces only OD. This observation suggests a general approach to assessing bond controlled reactions in a variety of systems.

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