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Science 10 September 1971:
Vol. 173. no. 4001, pp. 1025 - 1026
DOI: 10.1126/science.173.4001.1025
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Articles

Clustering of Sulfur Dioxide and Water Vapor about Oxonium and Nitric Oxide Ions

A. W. Castleman Jr. 1, I. N. Tang 1, and H. R. Munkelwitz 1

1 Brookhaven National Laboratory, Upton,New York 11973

The mobilities of ions produced in electrical discharges in the presence of trace quantities of water vapor and sulfur dioxide are generally lower than those expected for simple ions. Mass spectrometric identification reveals that species composed of water vapor and sulfur dioxide molecules clustering about common atmospheric ions are formed under these conditions. The identification of these clusters provides an explanation for the effect of trace gases on the mobilities of ions.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)