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Accession Number ADA570779
Title Steric Control of Complex Chemical Reactions - II.
Publication Date Dec 2012
Media Count 4p
Personal Author K. Liu
Abstract The aim of this project is to understand and ultimately to stereo-control the reactive outcome of complex systems by vibrational excitations of reactants. The most exciting result during this period is the paper published in Nature Chemistry 4, 636-641 (2012). In that work, we reported the complete three-dimensional characterization of the sterics of a benchmark polyatomic reaction by measuring the dependence of the product state-resolved angular distributions on the spatial alignment of the reactive bond in a crossed molecular beam experiment. This is for the first time that a true three- dimensional view of the steric effects has been realized experimentally for any chemical reaction in the half century history of chemical dynamics. The results prove the existence of two distinct microscopic reaction mechanisms in the reaction of Cl + CHD3(v1=1) 8594; HCl(v=0, 1) + CD3(00). Detailed analysis further reveals the origin of the stereodynamics in the HCl(v=0) + CD3(00) product channel can be captured by a textbook line-of-centres model. In contrast, a time-delay pathway, most likely mediated by reactive resonances, appears to be operative in forming the excited HCl(v=1) + CD3(00) product pair.
Keywords Bonding
Chemical kinetics
Chemical reactions
Chemistry
Contrast
Cross beam devices
Delay
Distribution
Microscopy
Models
Molecular beams
Molecular dynamics
Polyatomic molecules
Reactants(Chemistry)
Reactivities
Resonance
Response
Standards

 
Source Agency Non Paid ADAS
NTIS Subject Category 99F - Physical & Theoretical Chemistry
57F - Cytology, Genetics, & Molecular Biology
Corporate Author Academia Sinica, Taipei (Taiwan). Inst. of Atomic and Molecular Sciences.
Document Type Technical report
Title Note Final rept. 1 Dec 2011-30 Nov 2012.
NTIS Issue Number 1315
Contract Number FA2386-12-1-4020

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