title: OH-initiated photooxidations of 1-pentene and 2-methyl-2-propen-1-ol: mechanism and yields of the primary carbonyl products.
abstract: The products of the gas-phase reactions of OH radicals with 1-pentene and 2-methyl-2-propen-1-ol (221MPO) at T=298±2 K and atmospheric pressure were investigated by using a 4500 L atmospheric simulation chamber that was built especially for this work. The molar yield of butyraldehyde was 0.74±0.12 mol for the reaction of 1-pentene. This work provides the first product molar yield determination of formaldehyde (0.82±0.12 mol), 1-hydroxypropan-2-one (0.84±0.13 mol), and methacrolein (0.078±0.012 mol) from the reaction of 221MPO with OH radicals. The mechanism of this reaction is discussed in relation to the experimental results. Additionally, taking into consideration the complex mechanism, the rate coefficients of the reactions of OH with formaldehyde, 1-hydroxypropan-2-one, and methacrolein were derived at atmospheric pressure and T=298±2 K.; the obtained values were (8.9±1.6)×10(-12) , (2.4±1.4)×10(-12) , and (22.9±2.3)×10(-12) cm(3) molecule(-1) s(-1) , respectively.
authors.affiliation: Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET and Centro Láser de Ciencias Moleculares, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, 5000 Córdoba (Argentina), Fax: (+54) 351-433-41-48.
authors.forename: Silvina A
authors.initials: SA
authors.lastname: Peirone
authors.forename: Pablo M
authors.initials: PM
authors.lastname: Cometto
authors.forename: Silvia I
authors.initials: SI
authors.lastname: Lane
mesh_terms: D000447:Aldehydes / Q000138:chemical synthesis* / Q000737:chemistry; D000475:Alkenes / Q000737:chemistry*; D001274:Atmospheric Pressure; D017665:Hydroxyl Radical / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction / Q000528:radiation effects; D055668:Photochemical Processes / Q000528:radiation effects; D020005:Propanols / Q000737:chemistry*
chemical_list: C000599271:2-methyl-2-propen-1-ol; D000447:Aldehydes; D000475:Alkenes; D020005:Propanols; D017665:Hydroxyl Radical; C410454:1-pentene; C018475:butyraldehyde
keywords: 1-pentene; photooxidation; product yields; radicals; solid-phase micro extraction