methanidyl | 50928-07-9

• 分子结构分类: 无机化合物 - 均质非金属化合物 - 均质其他非金属化合物
• 英文名称: methanidyl
• 英文别名: carbene radical anion
• CAS: 50928-07-9
• 化学式: CH₂
• 分子量: 14.0269
• InChiKey: BBNHULVYDKYRSP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  1
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  一氧化碳 、 methanidyl 生成 乙烯酮
  参考文献：
  名称：

  亚甲基自由基阴离子的气相化学

  摘要：

  亚甲基，CH/sub 2/ 作为原型卡宾，是所有反应中间体中研究最多的，但其阴离子 CH/sub 2//sup -/ 的化学性质完全未知。作者希望报告说，在他们的串联流动余辉选择离子流管 (FA-SIFT) 中，他们可以生成、分离、注入和检测 CH/sub 2//sup -/ 离子，信号高达 1000 counts/s并且噪声小于或等于1个计数/秒。因此，他们能够确定产物，并在需要时确定其与大量有机和无机中性试剂反应的准确速率常数。

  DOI：

  10.1021/ja00248a058
• 作为产物：
  描述：

  乙烷 生成 methanide 、 methanidyl 、 methanidediyl 、 alkaline earth salt of/the/ methylsulfuric acid
  参考文献：
  名称：

  低能电子撞击缩合烃膜产生的阴离子收率

  摘要：

  Low-energy (0-20 eV) electron impact on thin condensed hydrocarbon films is observed to produce, via dissociative attachment and dipolar dissociation, significant yields of H- and much lower yields of CH(n)- (n = 1-3) fragment anions. These yields have been measured as a function of incident electron energy and film thickness for the saturated n-C(n)H2n+2 (n = 2, 4-9) and for the unsaturated 1-C(n)H2n (n = 2-4) hydrocarbons. Each type of anion desorbing from the saturated hydrocarbon films exhibits a single dissociative attachment resonance at approximately 10 eV, the energy of which is found to vary only slightly with hydrocarbon chain length, in contrast with the trends observed in the gas phase for H- formation from these systems. The hydrogen anion yields produced from the unsaturated species are similar to those from the saturated species, while the larger fragment anions typically demonstrate asymmetric or bimodal yield distributions. The thickness dependence of the anion yields suggests that the observed H- anions are formed in the uppermost 3-5 layers of the film, while the larger desorbing anion fragments arise from the first 1-2 layers.

  DOI：

  10.1021/j100165a054

文献信息

• Gas phase chemistry of methylene radical anion
  作者：Charles H. DePuy、Stephan E. Barlow、Jane M. Van Doren、Chris R. Roberts、Veronica M. Bierbaum

  DOI：10.1021/ja00248a058

  日期：1987.7

  Methylene, CH/sub 2/, as the prototypical carbene, is among the most studied of all reactive intermediates, but the chemistry of its anion, CH/sub 2//sup -/, is completely unknown. The authors wish to report that in their tandem flowing afterglow-selected ion flow tube (FA-SIFT) they can generate, separate, inject, and detect CH/sub 2//sup -/ ions with signals of up to 1000 counts/s and with noise

  亚甲基，CH/sub 2/ 作为原型卡宾，是所有反应中间体中研究最多的，但其阴离子 CH/sub 2//sup -/ 的化学性质完全未知。作者希望报告说，在他们的串联流动余辉选择离子流管 (FA-SIFT) 中，他们可以生成、分离、注入和检测 CH/sub 2//sup -/ 离子，信号高达 1000 counts/s并且噪声小于或等于1个计数/秒。因此，他们能够确定产物，并在需要时确定其与大量有机和无机中性试剂反应的准确速率常数。
• Anion yields produced by low-energy electron impact on condensed hydrocarbon films
  作者：Paul Rowntree、L. Parenteau、L. Sanche

  DOI：10.1021/j100165a054

  日期：1991.6

  Low-energy (0-20 eV) electron impact on thin condensed hydrocarbon films is observed to produce, via dissociative attachment and dipolar dissociation, significant yields of H- and much lower yields of CH(n)- (n = 1-3) fragment anions. These yields have been measured as a function of incident electron energy and film thickness for the saturated n-C(n)H2n+2 (n = 2, 4-9) and for the unsaturated 1-C(n)H2n (n = 2-4) hydrocarbons. Each type of anion desorbing from the saturated hydrocarbon films exhibits a single dissociative attachment resonance at approximately 10 eV, the energy of which is found to vary only slightly with hydrocarbon chain length, in contrast with the trends observed in the gas phase for H- formation from these systems. The hydrogen anion yields produced from the unsaturated species are similar to those from the saturated species, while the larger fragment anions typically demonstrate asymmetric or bimodal yield distributions. The thickness dependence of the anion yields suggests that the observed H- anions are formed in the uppermost 3-5 layers of the film, while the larger desorbing anion fragments arise from the first 1-2 layers.