Energy transfer reactions of N/sub 2/(A/sup 3/. sigma. /sub u//sup +/) to SO and other diatomic and polyatomic molecules

Technical Report · Tue Dec 01 00:00:00 EST 1987

OSTI ID:5604767

Cao, De Zhao; Setser, D W

The total quenching rate constant of N/sub 2/(A/sup 3/..sigma../sub u//sup +/) by SO and the formation rate constant of SO(A/sup 3/..pi..) have been measured using microwave discharges of dilute SOCl/sub 2//Ar and SOF/sub 2//Ar mixtures as sources of SO(X). The initial vibrational distribution of SO(A) was estimated by extrapolating the steady-state distributions to low Ar pressure. The vibrational and electronic product state distributions from other excitation-transfer reactions of N/sub 2/(A) are summarized and compared with the SO and S/sub 2/ reactions. Total quenching rate constants of N/sub 2/(A/sup 3/..sigma../sub u//sup +/) also were measured for several diatomic halogens and for PF/sub 3/, PCl/sub 3/, POCl/sub 3/, NF/sub 3/, SOF/sub 2/, SO/sub 2/F/sub 2/, CCl/sub 2/F/sub 2/, CF/sub 4/ and HN/sub 3/. In several instances, effective N/sub 2/(A) decay constants also were measured for dilute mixtures of these reagents that had been passed through a microwave discharge. Unsuccessful attempts to excite PF(A/sup 3/..pi..), PCl(A/sup 3/..pi..), PO(B/sup 2/..sigma../sup +/) and CF/sub 2/(A-tilde/sup 1/A/sub 1/) from reaction of N/sub 2/(A) with the products from the microwave discharges of PF/sub 3/, PCl/sub 3/, POCl/sub 3/ and CF/sub 2/Cl/sub 2/ (and CF/sub 4/) are summarized. The rate constants for formation of I/sub 2/(D') from I/sub 2/ and NH(A) from HN/sub 3/ are small. Qualitative experiments demonstrated that the N/sub 2/(A) + XeF/sub 2/ reaction does not have a significant branching fraction for XeF(B) formation. 55 refs., 8 figs. 5 tabs.

• Research Organization: Kansas State Univ., Manhattan (USA). Dept. of Chemistry
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5604767
• Report Number(s): UCRL-21002; ON: DE88005414
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
54 ENVIRONMENTAL SCIENCES
NITROGEN
DE-EXCITATION
MOLECULE-MOLECULE COLLISIONS
ARGON
ATMOSPHERIC CHEMISTRY
CARBON FLUORIDES
CARBON TETRAFLUORIDE
CHEMICAL REACTION KINETICS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HALOGENATED ALIPHATIC HYDROCARBONS
HIGH-FREQUENCY DISCHARGES
HYDRAZOIC ACID
MOLECULES
PHOSPHORUS CHLORIDES
PHOSPHORUS COMPOUNDS
PHOSPHORUS FLUORIDES
QUENCHING
SULFUR COMPOUNDS
SULFUR OXIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
ELECTRIC DISCHARGES
ELEMENTS
ENERGY LEVELS
FLUIDS
FLUORIDES
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE GASES
REACTION KINETICS
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