High energy halogen atom reactions activated by nuclear transformations. Progress report, February 15, 1979-February 14, 1980

Technical Report · Fri Feb 01 04:00:00 EST 1980

DOI:https://doi.org/10.2172/5392899· OSTI ID:5392899

Rack, E P

The program consists of six interrelated areas: (1) Reactions of iodine with alkenes and alkynes activated by radiative neutron capture and isomeric transition in low pressure gaseous systems employing additives and rare gas moderators, high pressure, and liquid systems. Special attention was given to the reactivity of excited complex formation and structural effects of electrophilic iodine attack on various pi-bond systems. (2) The gas-to-condensed phase transition in halogen high energy chemistry. Current interest involves the study of caging effects of an ice lattice on recombination reactions involving neutron-irradiated frozen aqueous solutions of halogenated organic and biochemical solutes in order to learn more about kinetic energy effects, halogen size, solute molecule size, steric effects and hydrogen bonding within an ice lattice cage. (3) Systematics of halogen hot atom reactions. The reactions of /sup 80m/Br, /sup 80/Br, /sup 82m/Br + /sup 82/Br, /sup 82/Br, /sup 82/Br, /sup 128/I, /sup 130/I, and /sup 130m/I + /sup 130/I activated by radiative neutron capture or isomeric transition in hydrocarbons and halo-substituted alkanes in low pressure and high pressure gaseous systems employing additives and rare gas moderators are currently being studied. (4) Mathematical and computer simulation studies of caging events within an ice lattice are being investigated. (5) At Brookhaven National Laboratory, cyclotron-produced chlorine and fluorine hot atoms substitution reactions with molecules possessing a single chiral center are under investigation to determine the role of hot atom kinetic energy, halogen atom, enantioner structure, steric effects and phase on the extent of substitution by retention of configuration or by Walden inversion. (6) The applications of high energy techniques and concepts to neutron activation analysis for trace element determinations in biological systems was continued.

• Research Organization: Nebraska Univ., Lincoln (USA). Dept. of Chemistry
• OSTI ID: 5392899
• Report Number(s): COO-1617-63
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ACTIVATION ANALYSIS
ALKENES
ALKYNES
BARYON REACTIONS
BROMINE
CAPTURE
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMISTRY
ELEMENTS
ENERGY-LEVEL TRANSITIONS
HADRON REACTIONS
HALOGENS
HOT ATOM CHEMISTRY
HYDROCARBONS
ICE
IODINE
ISOMERIC TRANSITIONS
KINETICS
METALS
NEUTRON REACTIONS
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHASE TRANSFORMATIONS
RADIOCHEMISTRY
REACTION KINETICS
RESEARCH PROGRAMS
TRANSITION ELEMENTS
VANADIUM