The Ionization Potentials of the Deuterated Methanes
The Ionization Potentials of the Deuterated Methanes
复制标题
氘代甲烷的电离势
DOI：
10.1063/1.1748007
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发表时间：
1951
期刊：
影响因子：
--
通讯作者：
W. Bryce
中科院分区：
文献类型：
--
作者：
F. Lossing;A. Tickner;W. Bryce
甲烷和四种氘代甲烷的电离势已使用两台具有不同类型源的 90° 质谱仪通过电子碰撞测定。此外，还测量了乙炔、氘代乙炔、乙烯和氘代乙烯的电离势。使用简单的经验方法来获得可重复至 ±0.02 伏的值。对于甲烷，我们发现电离势随着分子中氘原子数量的增加而增加，CH4 的电离势与 CD4 的电离势相差 0.18 伏。尽管发现每个质谱仪上的这种差异相同，但两台仪器上测定的 CH4 电离势绝对值之间存在 0.11 伏的差异。为了在零点能量差的基础上解释 CH4 和 CD4 的电离势之间的差异，估计离子态下的力常数需要具有...
The ionization potentials of methane, and of the four deuterated methanes, have been determined by electron impact using two 90° mass spectrometers with different types of sources. In addition, the ionization potentials of acetylene, deuterated acetylene, ethylene, and deuterated ethylene have been measured. A simple empirical method is used to obtain values which are reproducible to ±0.02 volt. For the methanes the ionization potential is found to increase with the number of deuterium atoms in the molecule, with a difference of 0.18 volt between the value for CH4 and that for CD4. Although this difference is found to be the same on each of the mass spectrometers, there is a difference of 0.11 volt between the absolute values of the ionization potential as determined for CH4 on the two instruments. In order to explain the difference between the ionization potentials of CH4 and CD4 on the basis of zero point energy differences, it is estimated that the force constants in the ionic state would need to have ...