Oxygen atom exchange in the interaction of sup 18 OH with several small molecules

Journal Article · Thu Feb 09 04:00:00 EST 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100340a006· OSTI ID:5111933

Greenblatt, G D; Howard, C J ^[1]

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1. National Oceanic and Atmospheric Administration, Boulder, CO (USA)

Oxygen atom exchange between {sup 18}OH and several oxygen-containing molecules was studied in a flow tube by using laser magnetic resonance detection of the reagent {sup 18}OH and product {sup 16}OH. No significant exchange was observed for O{sub 2}, H{sub 2}O, CO, CO{sub 2}, N{sub 2}O, OCS, and SO{sub 2} at 298 and 400 K, and upper limits to the exchange rate coefficients are reported. The rate coefficients for the reactions of {sup 18}OH and {sup 16}OH with CO were found to be (1.49 {plus minus} 0.15) {times} 10{sup {minus}13} and (1.44 {plus minus} 0.15) {times} 10{sup {minus}13} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, respectively, at 298 K. NO and NO{sub 2} were found to exchange rapidly with k{sub ex} = (1.8 {plus minus} 0.6) {times} 10{sup {minus}11} and (1.0 {plus minus} 0.4) {times} 10{sup {minus}11} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, respectively, at 298 K. On the basis of a simple model of adduct formation k{sub {infinity}} values for the OH + NO and NO{sub 2} association reactions were estimated to be {ge} (3.6 {plus minus} 1.2) {times} 10{sup {minus}11} and {ge} (1.5 {plus minus} 0.6) {times} 10{sup {minus}11} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, respectively. Error limits are 95% confidence limits.

• OSTI ID: 5111933
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:3; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540110
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
DATA
ELEMENTS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FLOW RATE
FLUID FLOW
HYDROGEN COMPOUNDS
INFORMATION
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LIGHT NUCLEI
MEDIUM TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
NUCLEI
NUMERICAL DATA
OXIDES
OXYGEN
OXYGEN 16
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RADICALS
REACTION KINETICS
STABLE ISOTOPES
SULFUR COMPOUNDS
SULFUR OXIDES
WATER