cadmium,carbanide | 42217-97-0

• 分子结构分类: 有机化合物
• 英文名称: cadmium,carbanide
• 英文别名: monomethyl cadmium；Methylcadmium-Radikal
• CAS: 42217-97-0
• 化学式: CH₃Cd
• 分子量: 127.445
• InChiKey: SVAAKGCTWRXDHY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.58
• 重原子数：
  2.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  高纯二甲基镉 以 neat (no solvent) 为溶剂， 生成 cadmium,carbanide
  参考文献：
  名称：

  在 193 nm 光子照射下，在 295 K 下吸附的碲和烷基镉物质的光解

  摘要：

  已经使用 X 射线光电子能谱研究了在超高真空条件下在 295 K 下吸附碲和烷基镉形成的物质的光解分解。已观察到吸附在多晶金基材上的亚单层覆盖的二甲基碲在 193 nm 处经历几乎定量的光解分解，形成金属碲。分解中产生的碳氢化合物光碎片导致金表面上的碳污染可忽略不计。吸附在无定形 SiO2 上的二甲基镉既解吸又分解形成金属副产物。在这种情况下，大部分碳仍为碳氢化合物和碳化物污染物。在 Si(100) 和 GaAs(100) 表面上形成的两种金属的单甲基化合物在低通量 (0. 25 mJ cm−2) 用于这些实验；然而，观察到大量解吸。

  DOI：

  10.1063/1.99589

文献信息

• A new discharge nozzle for spectroscopic studies in supersonic jets
  作者：Andrew J. Bezant、Daniel D. Turner、Guy Dormer、Andrew M. Ellis

  DOI：10.1039/ft9969203023

  日期：——

  We describe a new nozzle for spectroscopic studies of reactive species in pulsed supersonic jets. This nozzle was designed as a cheap alternative to laser ablation methods for producing metal-containing species. It employs an electrical discharge to produce metal atoms by argon ion sputtering at the cathode. These metal atoms can then be mixed with appropriate reagents to produce metal-containing species before expansion into vacuum. To avoid rapid carbon deposition onto the metal source electrode when carbon-containing reagents are used, the reactive precursor must be kept away from the metal-sputtering region. Consequently, a dual channel nozzle has been developed in which two pulsed gas sources are mixed at a common point prior to expansion. This has been tested by preparing a number of spectroscopically well characterised metal-containing species. The results show that this nozzle is a viable alternative to laser ablation for producing metal-containing species. The spectroscopic data, obtained using laser-induced fluorescence, demonstrate that the nozzle has good pulse-to-pulse stability and can maintain signal amplitude for > 80 h before electrode replenishment is required.

  我们介绍了一种新的喷嘴，用于对脉冲超音速喷流中的反应物进行光谱研究。这种喷嘴是作为激光烧蚀法的廉价替代方法设计的，用于产生含金属的物种。它采用放电技术，通过阴极的氩离子溅射产生金属原子。然后，这些金属原子可以与适当的试剂混合，在膨胀到真空中之前产生含金属的物质。在使用含碳试剂时，为避免碳迅速沉积到金属源电极上，反应前驱体必须远离金属溅射区。因此，我们开发了一种双通道喷嘴，其中两个脉冲气源在膨胀前在一个共同点混合。通过制备一些光谱特性良好的含金属物种对其进行了测试。结果表明，这种喷嘴可替代激光烧蚀法生产含金属物质。利用激光诱导荧光获得的光谱数据表明，喷嘴具有良好的脉冲间稳定性，在需要补充电极之前，可以保持信号振幅大于 80 小时。
• The fluorescence depletion spectroscopy of CdCH3
  作者：Michael B. Pushkarsky、Timothy A. Barckholtz、Terry A. Miller

  DOI：10.1063/1.477867

  日期：1999.1.22

  The fluorescence depletion spectroscopy (FDS) technique has been applied to the Ã 2E electronic state of the CdCH3 radical to investigate “dark” vibronic levels. The observed FDS spectrum complements the sparse laser-induced fluorescence and resonance-enhanced multiphoton ionization spectra. Both the upper and lower spin components of the vibrationless level as well as excitations involving the symmetric modes ν2 and ν3, and the antisymmetric mode ν6, as well as combinations involving these modes, were observed. A combined Jahn-Teller and spin-orbit coupling model was used to explain the vibronic structure in the Ã 2E electronic state as well as strong variations in the Coriolis coupling constants obtained from the resolved rotational K structure. Lifetimes for fluorescing levels have been determined from their temporal decay and those for some dark levels via lifetime broadening measurements. The selectivity of the radiationless decay channel and its possible attribution to an isomerization process are discussed.
• Emission spectrum of CdCH3
  作者：Abraham Penner、Aviv Amirav、Richard Bersohn

  DOI：10.1016/0009-2614(91)90146-z

  日期：1991.1

  Laser excitation at 206-232 nm of a supersonic free jet of Cd(CH3)2 produced an emission due to one-photon absorption from vibrationally cold A-approximately CdCH3. The 0-0 line was at 444.1 nm and ground-state vibrational frequencies of 345 cm-1 (Cd-CH3 stretch) and 998 cm-1 (CH3 umbrella mode) were measured. Much stronger emissions caused by multiphoton absorption were seen at the atomic lines of Cd 3P1 (326.1 nm) and Cd 1-P (228.8 nm), and A --> X transition of CH.
• High resolution electronic spectroscopy of ZnCH₃ and CdCH₃
  作者：Timothy M. Cerny、Xue Qing Tan、James M. Williamson、Eric S. J. Robles、Andrew M. Ellis、Terry A. Miller

  DOI：10.1063/1.465521

  日期：1993.12.15

  ZnCH3 and CdCH3 radicals have been prepared in a cold supersonic free jet expansion and their laser-induced-fluorescence spectrum recorded for the Ã 2E←X̃ 2A1 electronic transition. These spectra show well resolved rotational and spin structure, which has been completely analyzed. This analysis yields the rotational constants and the components of the spin–rotation tensors in the à and X̃ states of both radicals. The observed constants are discussed in terms of the electronic structure of the radicals. It is demonstrated that the upper F2 spin–orbit component of the Ã 2E state of CdCH3 is strongly perturbed by another, dissociative electronic state. This leads to some predissociation of the Ã 2E3/2 component and a broadening of its lines. The rotational and fine structure in this state is also quite perturbed leading to an unusual, but still interpretable spectrum.
• The spectroscopy of the CdCH3 radical and its positive ion
  作者：Sergey I. Panov、David E. Powers、Terry A. Miller

  DOI：10.1063/1.475506

  日期：1998.1.22

  Resonantly enhanced multiphoton ionization, REMPI (2 color, 1+1′), and zero electron kinetic energy-pulsed field ionization, ZEKE-PFI, spectra are reported for the first organometallic radical, CdCH3. The combined REMPI and ZEKE-PFI data have necessitated a change of assignment for one of the bands of the Ã2E←X̃ 2A1 electronic transition of the neutral radical. The new assignment and the revised molecular parameters are reported. The ZEKE-PFI spectrum yields the adiabatic ionization potential for the CdCH3 radical and four of the six possible vibrational frequencies of its cation. Clearly resolved rotational (K level) structure is observed in some bands of the ZEKE-PFI spectrum, providing a unique experimental test for newly extended ZEKE-PFI rotational selection rules.