Rate coefficients for the gas-phase reactions of OH radicals with methylbutenols at 298 K

✍ Scribed by Takashi Imamura; Yumi Iida; Kinichi Obi; Ikue Nagatani; Kazumichi Nakagawa; Iulia Patroescu-Klotz; Shiro Hatakeyama

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 102 KB
• Volume: 36
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20008

✦ Synopsis

Abstract

The relative‐rate method has been used to determine the rate coefficients for the reactions of OH radicals with three C~5~ biogenic alcohols, 2‐methyl‐3‐buten‐2‐ol (k~1~), 3‐methyl‐3‐buten‐1‐ol (k~2~), and 3‐methyl‐2‐buten‐1‐ol (k~3~), in the gas phase. OH radicals were produced by the photolysis of CH~3~ONO in the presence of NO. Di‐n‐butyl ether and propene were used as the reference compounds. The absolute rate coefficients obtained with the two reference compounds agreed well with each other. The O~3~ and O‐atom reactions with the target alcohols were confirmed to have a negligible contribution to their total losses by using two kinds of light sources with different relative rates of CH~3~ONO and NO~2~ photolysis. The absolute rate coefficients were obtained as the weighted mean values for the two reference compound systems and were k~1~ = (6.6 ± 0.5) × 10^−11^, k~2~ = (9.7 ± 0.7) × 10^−11^, and k~3~ = (1.5 ± 0.1) × 10^−10^ cm^3^ molecule^−1^ s^−1^ at 298 ± 2 K and 760 torr of air. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36: 379–385 2004