Crossed beam studies of endoergic bimolecular reactions: production of stable trihalogen radicals. [Reactions of F/sub 2/ with I/sub 2/, ICl, and HI]

Conference · Thu Apr 01 00:00:00 EST 1976

OSTI ID:7179939

Valentini, J J; Coggiola, M J; Lee, Y T

The trihalogens IIF and ClIF and the pseudo-trihalogen HIF were directly observed as the products of the endoergic bimolecular reactions of F/sub 2/ with I/sub 2/, ICl, and HI in a crossed molecular beam experiment. At high collision energies, a second reactive channel producing IF becomes important. Product angular and velocity distributions show that this IF does not result from a four-center exchange reaction. Observed threshold energies for the formation of IIF, ClIF, and HIF yield lower bounds on the stability of these molecules (with respect to the separated atoms) of 69, 81, and 96 kcal/mole, respectively. Analysis of the product center-of-mass angular distributions indicate that a slightly nonlinear approach is most effective in bringing about reaction to form the stable triatomic radical. These studies reveal a potentially important mechanism for the F/sub 2/ + I/sub 2/ ..-->.. 2IF bulk gas phase reaction. 12 figs.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7179939
• Report Number(s): LBL-4543; CONF-760901-1
• Conference Information: Faraday discussion on potential energy surfaces, Brighton, UK, 8 Sep 1976
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ANGULAR DISTRIBUTION
BEAMS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DISTRIBUTION
ELEMENTS
FLUORINE
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDRIODIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IODINE
IODINE CHLORIDES
IODINE COMPOUNDS
MOLECULAR BEAMS
NONMETALS
RADICALS
YIELDS