Absolute Rate Constants of Cr2(X1Σg+) with O2, NH3, and C2H4in the Gas Phase at Room Temperature

Flowing afterglow measurements are reported which provide rate constants and product identifications at 298 ± 2 K for the gas-phase reactions of OH− with CH3OH, C2H5OH, CH3OCH3, CH2O, CH3CHO, CH3COCH3, CH2CO, HCOOH, HCOOCH3, CH2=C=CH2, CH3—C≡CH, and C6H5CH3. The main channels observed were proton transfer and solvation of the OH−. Hydration with one molecule of H2O was observed either to reduce the rate slightly and lead to products which are the hydrated analogues of the "nude" reaction, or to stop the reaction completely, k ≤ 10−12 cm3 molecule−1 s−1. The reaction of OH−•H2O with CH3—C≡CH showed an uncertain intermediate behaviour.

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The reactions of O(3P) with 2-propanone, 2-butanone, and 3-pentanone

Canadian Journal of Chemistry ◽

10.1139/v86-240 ◽

1986 ◽

Vol 64 (7) ◽

pp. 1408-1414 ◽

Cited By ~ 3

Author(s):

John M. Roscoe

Keyword(s):

Gas Phase ◽

Rate Constants ◽

Substrate Concentration ◽

Activation Energies ◽

Absolute Rate ◽

The Absolute

The reactions of O(3P) with 2-propanone, 2-butanone, and 3-pentanone have been studied kinetically as a function of temperature and substrate concentration. The absolute rate constants for these reactions in the gas phase, in the units M−1 s−1, obey the following relations.[Formula: see text]The activation energies for these reactions are comparable to those for the reactions of O(3P) with alcohols, but the preexponential factors for the reactions of O(3P) with these ketones are significantly smaller than those for the analogous reactions with alcohols. The available data indicate that the reactivity of O(3P) toward ketones shows a variation with polar effects of substituents which is similar to that found for the reactions of OH with ketones.

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Absolute rate constants of Mo2 (X1Σg+) and Mo (a7S3) with O2 at room temperature

Chemical Physics Letters ◽

10.1016/0009-2614(96)00414-9 ◽

1996 ◽

Vol 256 (4-5) ◽

pp. 543-547 ◽

Cited By ~ 3

Author(s):

Tomohiro Wakabayashi ◽

Yo-ichi Ishikawa ◽

Shigeyoshi Arai

Keyword(s):

Rate Constants ◽

Room Temperature ◽

Absolute Rate

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Dibromosilylene: Determination of the absolute rate constants for its gas-phase reactions with oxygen and nitric oxide

Research on Chemical Intermediates ◽

10.1163/156856790x00058 ◽

1990 ◽

Vol 13 (1) ◽

pp. 43-52 ◽

Cited By ~ 2

Author(s):

V. Sandhu ◽

O. P. Strausz ◽

T. N. Bell

Keyword(s):

Nitric Oxide ◽

Gas Phase ◽

Rate Constants ◽

Absolute Rate ◽

Gas Phase Reactions ◽

The Absolute

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Absolute rate constants for the gas-phase ozonolysis of isoprene and methylbutenol

International Journal of Chemical Kinetics ◽

10.1002/kin.10175 ◽

2004 ◽

Vol 36 (3) ◽

pp. 152-156 ◽

Cited By ~ 15

Author(s):

N. Klawatsch-Carrasco ◽

J. F. Doussin ◽

P. Carlier

Keyword(s):

Gas Phase ◽

Rate Constants ◽

Absolute Rate

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The reactions of O(3P) with the butanols

Canadian Journal of Chemistry ◽

10.1139/v83-466 ◽

1983 ◽

Vol 61 (12) ◽

pp. 2716-2720 ◽

Cited By ~ 3

Author(s):

John M. Roscoe

Keyword(s):

Free Energy ◽

Gas Phase ◽

Rate Constants ◽

Substrate Concentration ◽

Kinetic Data ◽

Absolute Rate ◽

Gas Phase Reactions ◽

Linear Free Energy ◽

Different Types ◽

Energy Relations

The reactions of O(3P) with the butanols were studied kinetically as a function of temperature and substrate concentration. The absolute rate constants for the gas phase reactions, in the units M−1 s−1, obey the following relations.[Formula: see text]The results suggest that although the α-CH bond in these alcohols is the most reactive one, reaction of O(3P) with other CH bonds in the alcohols is also appreciable. The kinetic data for these and other alcohols are separated into contributions from the different types of CH bonds and the results are discussed in terms of linear free energy relations.

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