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Atmospheric Environment,
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Description: The bimolecular rate constants, k"O"H"+"g"e"r"a"n"i"o"l, (231+/-58)x10^-^1^2cm^3molecule^-^1s^-^1 and k"O"""3"+"g"e"r"a"n"i"o"l, (9.3+/-2.3)x10^-^1^6cm^3molecule^-^1s^-^1, were measured using the relative rate technique for the reaction of the hydroxyl radical (OH) and ozone (O"3) with 2,6-dimethyl-2,6-octadien-8-ol (geraniol) at (297+/-3)K and 1 atmosphere total pressure. To more clearly define part of geraniol's indoor environment degradation mechanism, the products of the geraniol+OH and geraniol+O"3 reactions were also investigated. The identified geraniol+OH and geraniol+O"3 reaction products were: acetone, hydroxyacetaldehyde (glycolaldehyde, HC(?O)CH"2OH), ethanedial (glyoxal, HC(?O)C(?O)H), and 2-oxopropanal (methylglyoxal, CH"3C(?O)C(?O)H). The use of derivatizing agents O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) and N,O-bis(trimethylsilyl) trifluoroacetamide (BSTFA) were used to propose 4-oxopentanal as the other major geraniol+OH and geraniol+O"3 reaction product. The elucidation of this other reaction product was facilitated by mass spectrometry of the derivatized reaction products coupled with plausible geraniol+OH and geraniol+O"3 reaction mechanisms based on previously published volatile organic compound+OH and volatile organic compound+O"3 gas-phase reaction mechanisms. .
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