Rate constants for the gas‐phase reactions of O3 with a series of monoterpenes and related compounds at 296 ± 2 K

International Journal of Chemical Kinetics - Tập 22 Số 8 - Trang 871-887 - 1990
Roger Atkinson1, David Hasegawa1, Sara M. Aschmann1
1Statewide Air Pollution Research Center, University of California, Riverside, California 92521

Tóm tắt

AbstractRate constants for the gas‐phase reactions of O3 with a series of monoterpenes and related compounds have been determined at 296 ± 2 K and 740 torr total pressure of air or O2 using a combination of absolute and relative rate techniques. Good agreement between the absolute and relative rate data was observed, and the rate constants obtained (in units of 10−17 cm3 molecule−1 s−1) were: α‐pinene, 8.7; β‐pinene, 1.5; Δ3‐carene, 3.8; 2‐carene, 24; sabinene, 8.8; d‐limonene, 21; γ‐terpinene, 14; terpinolene, 140; α‐phellandrene, 190; α‐terpinene, 870; myrcene, 49; trans‐ocimene, 56; p‐cymene, <0.005; and 1,8‐cineole, <0.015. While these rate constants for α‐ and β‐pinene and sabinene are in good agreement with recent absolute and relative rate determinations, those for the other monoterpenes are generally lower than the literature data by factors of ca. 2–10. The measured rate constants for the monoterpenes are reasonably consistent with predictions based upon the number and positions of the substituent groups around the 〉CC〈 bond(s).

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International Journal of Chemical Kinetics

Tập 22 Số 8

871-887

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