Formation of a long-lived cyclic isomer of ethylenedione.
Formation of a long-lived cyclic isomer of ethylenedione.
复制标题
乙二酮长寿命环状异构体的形成
DOI:
10.1039/c9cp01616c
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Th. Henning
中科院分区:
文献类型:
--
作者:
S. A. Krasnokutski;O. Tkachenko;C. Jäger;Th. Henning
A century of unsuccessful attempts to identify the neutral ethylenedione molecule combined with the results of quantum-chemical computations resulted in the conclusion on the instability of this molecule. In this article, we demonstrate that although the lowest energy isomer of ethylenedione with linear geometry is indeed unstable, a higher energy three-membered cyclic isomer can be stabilized, and at low temperature has a life-time longer than one millisecond. In our study, the ethylenedione C2O2 molecule was synthesized in the low-temperature reaction CO2 + C → C2O2 inside liquid helium nanodroplets. To study the reaction, a newly developed calorimetric technique was applied. Single pairs of reactants were incorporated into tiny helium droplets having a temperature of 0.37 K. The reaction energy was transferred to liquid helium stabilizing an intermediate gas-phase reaction product. The energy transfer also resulted in the evaporation of helium atoms. Therefore, the change of the helium droplets’ size allowed precise calorimetry on a molecular scale.
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DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
D. Dawson;H. Chen;John L. Holmes
通讯作者:
John L. Holmes
影响因子:
2.9
作者:
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DOI:
10.1063/1.4953774
发表时间:
2016
期刊:
The Journal of chemical physics
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
1988
期刊:
影响因子:
--
作者:
M. Rubin;A. Patyk;W. Sander
通讯作者:
W. Sander
DOI:
10.1063/1.4908533
发表时间:
2015
期刊:
The Journal of chemical physics
影响因子:
--
作者:
S. A. Krasnokutski;F. Huisken
通讯作者:
F. Huisken