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4‐Chlorocrotonaldehyde as a unique chlorine‐containing compound from the reaction of atomic chlorine with 1,3‐butadiene in air at room temperature
Author(s) -
Wang Weihong,
FinlaysonPitts Barbara J.
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl011051
Subject(s) - chlorine , 1,3 butadiene , chemistry , environmental chemistry , troposphere , atmospheric chemistry , yield (engineering) , ozone , organic chemistry , meteorology , materials science , catalysis , physics , metallurgy
Chlorine atoms may play an important role in the tropospheric chemistry of coastal areas and the Arctic at polar sunrise. However, the sources of chlorine are not well established and measuring its precursors in a specific manner is difficult. A potential approach to probe Cl production in the troposphere is to identify and measure chlorine‐containing products unique to the reactions of Cl with organics in air, e.g. 1,3‐butadiene, which is emitted from motor vehicles. We present here product studies of the reaction of Cl with 1,3‐butadiene in the presence and absence of NO in 1 atm air at room temperature using FTIR, API‐MS and GC‐MS. 4‐Chlorocrotonaldehyde (CCA) is identified as a unique chlorine‐containing product from this reaction, with a yield of (28 ± 8)% (2σ) independent of the presence of NO. CCA may therefore be useful in field studies as a marker for Cl chemistry in urban coastal areas.