Kinetics Of C2H radical reactions with ethene, propene and 1-butene measured in a pulsed Laval nozzle apparatus at T-103 and 296 K

被引：58

作者：

Vakhtin, AB

Heard, DE

Smith, IWM

Leone, SR ^{[1
]}

机构：

[1] Univ Colorado, Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 348卷 / 1-2期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/S0009-2614(01)00975-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-temperature kinetics of the reactions of C2H radical with ethene (k(1)), propene (k(1)), and 1-butene (k(3)) are studied using a pulsed Laval nozzle supersonic expansion. The C2H decay profiles in the presence of both the alkene reactant and O-2 are monitored by the CH(A(2) Delta) chemiluminescence tracer method. The rate constants k(1), k(2), and k(3) are measured at T = 103 K to be (1.4 +/- 0.4) x 10(-10), (2.4 +/- 0.6) x 10(-10), and (2.6 +/- 0.6) x 10(10) cm(3) molecule(-1) s(-1), respectively. Measurements at room temperature (296 K) and previous data suggest a slight negative temperature dependence for all three reactions. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：21 / 26

页数：6

相关论文

共 24 条

[1] Crossed beam reaction of cyano radicals with hydrocarbon molecules.: III.: Chemical dynamics of vinylcyanide (C2H3CN;X 1A') formation from reaction of CN(X 2Σ+) with ethylene, C2H4(X 1Ag) [J].

Balucani, N ;

Asvany, O ;

Chang, AHH ;

Lin, SH ;

Lee, YT ;

Kaiser, RI ;

Osamura, Y .

JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (19) :8643-8655

[2] Low temperature rate coefficients for the reactions of CN and C2H radicals with allene (CH2=C=CH2) and methyl acetylene (CH3C≡CH) [J].

Carty, D ;

Le Page, V ;

Sims, IR ;

Smith, IWM .

CHEMICAL PHYSICS LETTERS, 2001, 344 (3-4) :310-316

[3] Neutral-neutral reactions at the temperatures sf interstellar clouds -: Rate coefficients for reactions of C2H radicals with O2, C2H2, C2H4 and C3H6 down to 15 K [J].

Chastaing, D ;

James, PL ;

Sims, IR ;

Smith, IWM .

FARADAY DISCUSSIONS, 1998, 109 :165-181

[4]

COUSTENIS A, 1990, ANN GEOPHYS, V8, P645

[5] Low-temperature rate coefficients for reactions of the ethynyl radical (C2H) with C3H4 isomers methylacetylene and allene [J].

Hoobler, RJ ;

Leone, SR .

JOURNAL OF PHYSICAL CHEMISTRY A, 1999, 103 (10) :1342-1346

[6] Crossed beam reaction of cyano radicals with hydrocarbon molecules.: IV.: Chemical dynamics of cyanoacetylene (HCCCN; X 1Σ+) formation from reaction of CN(X 2Σ+) with acetylene, C2H2(X 1Σg+) [J].

Huang, LCL ;

Asvany, O ;

Chang, AHH ;

Balucani, N ;

Lin, SH ;

Lee, YT ;

Kaiser, RI ;

Osamura, Y .

JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (19) :8656-8666

[7] Vertical distribution of Titan's atmospheric neutral constituents [J].

Lara, LM ;

Lellouch, E ;

LopezMoreno, JJ ;

Rodrigo, R .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 1996, 101 (E10) :23261-23283

[8] Direct measurements of rate coefficients for the reaction of ethynyl radical (C2H) with C2H2 at 90 and 120 K using a pulsed Laval nozzle apparatus [J].

Lee, S ;

Samuels, DA ;

Hoobler, RJ ;

Leone, SR .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2000, 105 (E6) :15085-15090

[9] A pulsed Laval nozzle apparatus with laser ionization mass spectroscopy for direct measurements of rate coefficients at low temperatures with condensable gases [J].

Lee, S ;

Hoobler, RJ ;

Leone, SR .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2000, 71 (04) :1816-1823

[10] Rate coefficients for the reaction of C2H with O2 at 90 K and 120 K using a pulsed Laval nozzle apparatus [J].

Lee, S ;

Leone, SR .

CHEMICAL PHYSICS LETTERS, 2000, 329 (5-6) :443-449