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Volumn 111, Issue 22, 2007, Pages 4792-4803

Concerted and stepwise reaction mechanisms for the addition of ozone to acetylene: A computational study

Author keywords

[No Author keywords available]

Indexed keywords

BIRADICALOID TRANSITION STATE; OZONIDE; SPIN SYMMETRY BREAKING; WAVE FUNCTION INSTABILITY;

EID: 34250702045     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0633188     Document Type: Article
Times cited : (20)

References (37)
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    • Sander, S. P.; Golden, D. M.; Kurylo, M. J.; Moortgat, G. K.; Ravishankara, A. R.; Kolb, C. E.; Molina. M. J.; Finlayson, B. J. Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies; Jet Propulsion Laboratory Publication 02-25, Evaluation Number 14; Pasadena, CA, 2003, Note D6.
    • Sander, S. P.; Golden, D. M.; Kurylo, M. J.; Moortgat, G. K.; Ravishankara, A. R.; Kolb, C. E.; Molina. M. J.; Finlayson, B. J. Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies; Jet Propulsion Laboratory Publication 02-25, Evaluation Number 14; Pasadena, CA, 2003, Note D6.
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    • Ref 10a reports a calculated value of 0.13 units (quoted as 0.8 M-1 s-1) for k298 compared with the NASA value of 1 unit. A k298 of 48.3 M-1 s-1 is attributed to DeMore's study. DeMore's 1969 study, referred to in ref 10a, was carried out in a temperature range from 243 to 283 K, and no room temperature measurement was reported. The measured rate constants fall in the range of 0.3-11.8 M -1 s-1. DeMore's rate constant measured at 294 K reported in the 1971 study (18 M-1 s-1) is, in fact, in closer agreement with the NASA-recommended value than the calculated value of ref 10a, c) Ref 10a reports an A factor of 1.71 × 106 M-1 s-1 calculated with transition state theory (TST) at 298 K, which is in close agreement with the recommended value in the NASA database. However, a uniquely defined A factor cannot be derived for only one single temper
    • 0, respectively. The zero-point energies used for evaluation of energy changes in ref 10a were calculated with DFT-B3LYP (with the exception of the vdW complex). Geometry optimizations were carried out at the CCSD(T) level.
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    • In ref 13a, BHandHLYP/6-31+G(d) was employed for the A factor calculations for T, 235-362 K. The value of log A (A in mole-1 cm3 s-1) obtained for the concerted pathway of the ozonation of ethylene is 9.96, compared with the experimental value28 of 9.73. Forpropene, the calculated value is 9.40, compared with the experimental value of 9.57
    • 28 of 9.73. Forpropene, the calculated value is 9.40, compared with the experimental value of 9.57.
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    • a to 12 kcal/mol.
    • a to 12 kcal/mol.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.