Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range
Sidhu, S. S. ; Kiefer, J. H. ; Lifshitz, A. ; Tamburu, C. ; Walker, J. A. ; Tsang, W.
New York, NY : Wiley-Blackwell
Published 1991
New York, NY : Wiley-Blackwell
Published 1991
| ISSN: |
0538-8066
|
|---|---|
| Keywords: |
Chemistry ; Physical Chemistry
|
| Source: |
Wiley InterScience Backfile Collection 1832-2000
|
| Topics: |
Chemistry and Pharmacology
|
| Notes: |
Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures.
|
| Additional Material: |
8 Ill.
|
| Type of Medium: |
Electronic Resource
|
| URL: |
| _version_ | 1798298198509355008 |
|---|---|
| addmaterial | 8 Ill. |
| autor | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| autorsonst | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| book_url | http://dx.doi.org/10.1002/kin.550230304 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLM162464444 |
| issn | 0538-8066 |
| journal_name | International Journal of Chemical Kinetics |
| materialart | 1 |
| notes | Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures. |
| package_name | Wiley-Blackwell |
| publikationsjahr_anzeige | 1991 |
| publikationsjahr_facette | 1991 |
| publikationsjahr_intervall | 8009:1990-1994 |
| publikationsjahr_sort | 1991 |
| publikationsort | New York, NY |
| publisher | Wiley-Blackwell |
| reference | 23 (1991), S. 215-227 |
| schlagwort | Chemistry Physical Chemistry |
| search_space | articles |
| shingle_author_1 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| shingle_author_2 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| shingle_author_3 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| shingle_author_4 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. |
| shingle_catch_all_1 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range Chemistry Physical Chemistry Chemistry Physical Chemistry Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures. 0538-8066 05388066 Wiley-Blackwell |
| shingle_catch_all_2 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range Chemistry Physical Chemistry Chemistry Physical Chemistry Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures. 0538-8066 05388066 Wiley-Blackwell |
| shingle_catch_all_3 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range Chemistry Physical Chemistry Chemistry Physical Chemistry Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures. 0538-8066 05388066 Wiley-Blackwell |
| shingle_catch_all_4 | Sidhu, S. S. Kiefer, J. H. Lifshitz, A. Tamburu, C. Walker, J. A. Tsang, W. Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range Chemistry Physical Chemistry Chemistry Physical Chemistry Rate constants for the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine, to 1,3-butadiene and methanimine, have been measured over 650-1450 K. To cover this range, three separate techniques were used at three laboratories: laser schlieren and single pulse shock tube methods, and a comparative rate flow system technique. The derived rate constants are extrapolated to the high-pressure limit with an RRKM model parameterized to fit the falloff observed in the laser-schlieren measurements. The resulting high-pressure rate constants show a reduction in activation energy of about 10 kcal/mol, comparing the isoelectronic cyclohexene, but little change in A-factor. There is an apparent increase in activation energy of 4 kcal/mol over the temperature range of these experiments, which is just outside probable error. Such a rise in activation energy is in marked contrast to the drop usually seen in simple bond fission, and may reflect a change from a concerted to a stepwise, biradical mechanism at high temperatures. 0538-8066 05388066 Wiley-Blackwell |
| shingle_title_1 | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| shingle_title_2 | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| shingle_title_3 | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| shingle_title_4 | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | Wiley InterScience Backfile Collection 1832-2000 |
| timestamp | 2024-05-06T10:20:05.060Z |
| titel | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| titel_suche | Rate of the retro-Diels-Alder dissociation of 1,2,3,6-tetrahydropyridine over a wide temperature range |
| topic | V |
| uid | nat_lic_papers_NLM162464444 |