chromium dimer | 12184-82-6

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 英文名称: chromium dimer
• 英文别名: chromium；dichromium；(chromium)2
• CAS: 12184-82-6
• 化学式: Cr₂
• 分子量: 103.992
• InChiKey: RMXTYBQNQCQHEU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  2
• 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：
  0

反应信息

• 作为反应物：
  描述：

  氧气 、 chromium dimer 以 neat (no solvent) 为溶剂， 生成 Chromium--water (2/1)
  参考文献：
  名称：

  Oxidation processes of chromium dimer and trimer cations in an ion trap

  摘要：

  Oxidation processes of chromium cluster cations, Cr-2(+) and Cr-3(+), are investigated by kinetics measurements under multiple-collision conditions by using a temperature-controlled ion trap. Both of the reactants commonly generate Cr+ and CrO+ as final products. However, the major reaction pathway to CrO+ presents a sharp contrast; Cr-2(+) produces it directly by a single O-2 collision, whereas Cr-3(+) does via an intermediate Cr2O+. Comparison of the kinetics of the intermediate with that of cold Cr2O+ generated in the cluster source reveals that the intermediate Cr2O+ is thermalized promptly with the buffer gas filling the trap. (C) 2012 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.cplett.2012.04.040
• 作为产物：
  描述：

  六羰基铬 以 gas 为溶剂， 生成 chromium dimer
  参考文献：
  名称：

  通过气相离子分子反应形成金属簇离子：Cr 2 +和Mn 2 +的键能

  摘要：

  Cr（CO）6，Fe（CO）5和Mn 2（CO）10系统中发生的离子分子反应是在傅立叶变换离子回旋共振（FTICR）光谱仪中进行的。可以通过采用包括选择性喷射和光解离的多脉冲序列来形成大量的裸金属簇离子。在随后的碰撞活化实验中，Cr 2 +和Mn 2 +的结合能分别确定为1.6±0.2 eV和2.1±0.3 eV，后者与先前报道的值相矛盾。

  DOI：

  10.1016/0009-2614(89)87130-1

文献信息

• Formation of metal cluster ions by gas-phase ion-molecule reactions: The bond energies of Cr2+ AND Mn2+
  作者：R. Houriet、T. Vulpius

  DOI：10.1016/0009-2614(89)87130-1

  日期：1989.2

  Ion-molecule reactions occurring in Cr(CO)6, Fe(CO)5, and Mn2(CO)10 systems are carried out in a Fourier transform ion cyclotron resonance (FTICR) spectrometer. Abundant intensities of bare metal cluster ions can be formed by employing a multiple pulse sequence including selective ejections and photodissociation. In subsequent collisional activation experiments, the binding energies of Cr2+ and Mn2+

  Cr（CO）6，Fe（CO）5和Mn 2（CO）10系统中发生的离子分子反应是在傅立叶变换离子回旋共振（FTICR）光谱仪中进行的。可以通过采用包括选择性喷射和光解离的多脉冲序列来形成大量的裸金属簇离子。在随后的碰撞活化实验中，Cr 2 +和Mn 2 +的结合能分别确定为1.6±0.2 eV和2.1±0.3 eV，后者与先前报道的值相矛盾。
• UV-visible and Raman investigations of matrix isolated adducts between metal vapors of chromium and benzene: selective photo-irradiations effects
  作者：M. Dalibart、J. Derouault

  DOI：10.1007/bf01427004

  日期：1989.3
• Absolute Rate Constants of Cr₂(X¹Σ_g⁺) with O₂, NH₃, and C₂H₄in the Gas Phase at Room Temperature
  作者：Yo-ichi Ishikawa、Hiroshi Ogawa、Takayuki Iwaki

  DOI：10.1246/bcsj.75.493

  日期：2002.3

  chromium dimers (Cr2 (X 1Σg+)) for three small molecules (O2, NH3, and C2H4) were investigated in a mass-flow controlled cell. The transient concentration of Cr2 (X 1Σg+, v = 0) produced by pulsed 266-nm laser photolysis of [Cr(CO)6] was monitored by a time-resolved laser-induced fluorescence (LIF) at 459.67 nm (A 1Σu+, v′′ = 0 ← X 1Σg+, v′ = 0). The pseudo-first-order decay rates of Cr2 (X 1Σg+) were

  在质量流量控制池中研究了基态铬二聚体 (Cr2 (X 1Σg+)) 对三种小分子（O2、NH3 和 C2H4）的气相反应性。[Cr(CO)6] 的脉冲 266 nm 激光光解产生的 Cr2 (X 1Σg+, v = 0) 的瞬态浓度通过时间分辨激光诱导荧光 (LIF) 在 459.67 nm (A 1Σu+, v′′ = 0 ← X 1Σg+, v′ = 0)。观察到 Cr2 (X 1Σg+) 的准一级衰减率随着 O2 和 NH3 压力的增加而线性增加，给出的准二级速率常数为 (2.3 ± 0.3)×10-11 cm3 分子-1 s- 1 对于 Cr2 + O2 和 (4.3 ± 0.8)×10-13 cm3 分子-1 s-1 对于 Cr2 + NH3 在 6.0-Torr 总压力下，在室温下使用 Ar 缓冲气体。另一方面，在我们的实验条件下，显然发现 C2H4 不与 Cr2 (X 1Σg+)
• Oxidation processes of chromium dimer and trimer cations in an ion trap
  作者：Tomonori Ito、Kazuhiro Egashira、Koichi Tsukiyama、Akira Terasaki

  DOI：10.1016/j.cplett.2012.04.040

  日期：2012.6

  Oxidation processes of chromium cluster cations, Cr-2(+) and Cr-3(+), are investigated by kinetics measurements under multiple-collision conditions by using a temperature-controlled ion trap. Both of the reactants commonly generate Cr+ and CrO+ as final products. However, the major reaction pathway to CrO+ presents a sharp contrast; Cr-2(+) produces it directly by a single O-2 collision, whereas Cr-3(+) does via an intermediate Cr2O+. Comparison of the kinetics of the intermediate with that of cold Cr2O+ generated in the cluster source reveals that the intermediate Cr2O+ is thermalized promptly with the buffer gas filling the trap. (C) 2012 Elsevier B.V. All rights reserved.