carbon | 12070-15-4

• 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: carbon
• 英文别名: carbon cluster；carbon dimer；ethyne
• CAS: 12070-15-4
• 化学式: C₂
• 分子量: 24.022
• InChiKey: LBVWYGNGGJURHQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.4
• 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：
  1

反应信息

• 作为反应物：
  描述：

  carbon 生成 乙炔
  参考文献：
  名称：

  碳原子/簇与甲烷、溴甲烷和水在 10 K 和 77 K 下的反应

  摘要：

  C 原子、C{sub 2} 和​​ C{sub 3} 的反应在基质分离条件（10 K，氩气）下与甲烷、溴甲烷和水进行监测。使用 CH{sub 4} + C，单线态 ({sup 1}D) 通过 CH 插入反应，然后重排为乙烯。基态{sup 3}P 原子没有反应，虽然C{sub 2} 发生了反应，但产物无法通过光谱测定。三聚体 C{sub 3} 和更高的簇不与 CH{sub 4} 反应。与 CH{sub 3}Br、C、C{sub 2}、C{sub 3} 和更高的簇都发生了反应。具有C原子的主要产物是由C-Br插入形成的稳定的卡宾CH{sub 3}CBr。对于 H{sub 2}O，主要产物是由 {sup 1}S 和/或 {sup 1}D 碳原子形成的 CO。碳簇也发生反应，但效率低于 CH{sub 3}Br。为了确定碳蒸气与甲烷反应时可分离产物的性质，在 77 K 下进行了碳弧实验和 5-重氮四

  DOI：

  10.1021/ja00206a003
• 作为产物：
  描述：

  四氯乙烯 在 氢化钾 作用下， 生成 carbon
  参考文献：
  名称：

  CN(A2Πi→X2Σ+) chemiluminescence from the N+C2N, N+CCl, and N+C2 reactions under low-pressure fast-flow conditions

  摘要：

  The reaction of potassium atoms with C2NCl3, CCl4, and C2Cl4, have been used to produce C2N, CCl, and C-2 radicals. The addition of nitrogen atoms to the products of these reactions yields CN(A (II)-I-2 --> X(2)Sigma(+)) chemiluminescence, detected from vibrational levels nu(A) = 2-16. The vibrational distribution of CN(A) are, respectively, for different reactions, similar to a statistical decrease from nu(A) = 2 to nu(A) = 14 for N + C2N, inverted with a maximum for nu(A) = 8 for N + CCl, and limited to v(A) = 2 level for N + C-2. (C) 2000 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0009-2614(00)00588-1

文献信息

• Dicyanoacetylene photodissociation at 193 nm and at 248 nm studied by transient absorption spectroscopy. Production of CN, C2 and C3N
  作者：Robert Kołos、Zbigniew Zieliński、Zbigniew R. Grabowski、Tadeusz Mizerski

  DOI：10.1016/0009-2614(91)87119-v

  日期：1991.5

  Laser photolysis of dicyanoacetylene at 193 nm and at 248 nm, leading to the production of CN, C2 and (probably) C3N, has been investigated. CN violet bands and C2 Swan bands were observed in absorption. Photolysis at 193 nm produces CN in both the X2Σ+ and in the 2Πi manifolds, the latter — probably populated via a two-proton process — being revealed by a delayed (collision-induced) population of

  已经研究了在193 nm和248 nm处对二氰基乙炔进行激光光解，从而导致CN，C 2和（可能）C 3 N的产生。在吸收中观察到CN紫带和C 2天鹅带。光解在193nm产生CN在X 2 Σ +，并在2 Π我歧管，后者-可能经由一个双质子过程填充-由较高振动能级的延迟（碰撞诱导）群体被泄露接地电子状态。248 nm处的光解是一种有效的两光子过程。尚不清楚哪种机制负责C 2的形成分子在193 nm。在整个论文中，Sadlej和Roos的理论有助于选择对实验的最佳解释。
• Wide-Temperature Range Kinetics and CN(B−X) Violet Chemiluminescence of the C₂(a³Π) + NO Reaction^†
  作者：Aleksandra Ristanovic、Abel Fernandez、Arthur Fontijn

  DOI：10.1021/jp014553n

  日期：2002.9.1

  of ±20%. The slight negative activation energy is indicative of intermediate complex formation. The results are compared to the C2 + NO measurements by Kruse and Roth for the 3150−3950 K temperature range and confirm that a mechanism change occurs between the two respective temperature ranges. In the present work, under otherwise constant conditions the CN(B−X) emission intensity increases with bath

  在 HTP（高温光化学）反应器中研究了 C2(a3Π) + NO(X2Π) → CN (A2Π, B2Σ) + CO (X1Σ) 反应。C2 由 C2Cl4 的 193 nm 多光子光解产生。CN (B-X) (0,0) 和 (1,1) 化学发光用作诊断。C2 消耗率系数是在伪一阶条件下测量的，发现与 5-200 mbar 域中的压力无关。它们产生 k(292−968 K) = 4.3 × 10-11 exp(89 K/T) cm3 分子-1 s-1，2σ 精度限值为 ±5%，相应的估计精度限值为 ±20%。轻微的负活化能表明中间复合物的形成。将结果与 Kruse 和 Roth 在 3150-3950 K 温度范围内的 C2 + NO 测量值进行比较，并确认在两个相应温度范围之间发生了机制变化。
• Growth of carbon clusters. The simplest process, 2C1? C2, observed via spectrometry and chemical reaction
  作者：Akihiro Wakisaka、J. J. Gaumet、Yukio Shimizu、Yukio Tamori、Hideki Sato、Katsumi Tokumaru

  DOI：10.1039/ft9938901001

  日期：——

  A graphite sample has been irradiated with a YAG laser under an argon atmosphere. The emission due to the C2(d 3Πg→ a 3Πu) Swan band was observed with a decay time 20 times the intrinsic lifetime of C2(d 3Πg). In the presence of benzene, which reacts with C1, the observed decay time of the C2 Swan band decreased with increasing benzene around the graphite. Furthermore, the reaction products between benzene and C1 or C2 were identified and their distribution varied remarkably with benzene concentration. From these results, the simplest growth process of carbon clusters, 2C1→ C2, was confirmed experimentally. Comparing the emission spectra from the irradiated graphite surface under an argon atmosphere and under vacuum, the collisional relaxation of C1 with argon was found to be indispensable to the growth process.

  在氩气环境下用 YAG 激光辐照石墨样品。观察到 C2(d 3Î gâ a 3Î u) 天鹅带的发射，其衰减时间是 C2(d 3Î g) 固有寿命的 20 倍。在苯的存在下，C2 天鹅带会与 C1 发生反应，随着石墨周围苯的增加，观测到的 C2 天鹅带衰减时间缩短。此外，还确定了苯与 C1 或 C2 之间的反应产物，它们的分布随苯浓度的变化而显著不同。根据这些结果，实验证实了碳簇最简单的生长过程，即 2C1â C2。通过比较氩气环境下和真空环境下辐照石墨表面的发射光谱，发现 C1 与氩气的碰撞弛豫是生长过程中不可或缺的因素。
• C2 Radicals in a supersonic molecular beam. Radiative lifetime of the d 3Πg state measured by laser-induced fluorescence
  作者：C. Naulin、M. Costes、G. Dorthe

  DOI：10.1016/0009-2614(88)87402-5

  日期：1988.1

  pulsed supersonic molecular beams and radical generation by laser vaporisation of the corresponding solid target are used to produce C2 radicals seeded in a rare gas carrier beam. Extreme rotational cooling in the expansion, together with collision-free beam conditions, are shown to be particularly well suited for actual lifetime measurements. Analysis of laser-induced fluorescence decays of C2(d3Πg)

  脉冲超音速分子束与相应的固体靶标的激光汽化产生自由基的组合技术可用于产生接种在稀有气体载流子束中的C 2自由基。膨胀中的极端旋转冷却以及无碰撞的光束条件，特别适合实际寿命的测量。的C激光诱导荧光衰变的分析2（d 3 Π克）物种产生以下寿命值d状态的前三个振动能级：τ ν= O = 101.8±4.2纳秒，τ ν= 1 = 96.7±5.2 ns和τν = 2 104±17 ns。
• Study of Mn laser ablation in methane atmosphere
  作者：N. Krstulović、I. Labazan、S. Milošević

  DOI：10.1140/epjd/e2005-00285-3

  日期：2006.2

  Laser ablation of Mn target in vacuum and in the presence of CH4 was studied under 308 nm laser irradiation. Time-resolved emission using gated detection and scanning monochromator and absorption using the cavity ring-down spectroscopy were used to study vaporized plume. In the CH4 atmosphere we observed transitions identified as C2 and MnH bands, while these spectral features were not detected in emission spectra. This is a clear evidence of importance in combining both spectroscopic techniques in laser vaporized plume study.

  研究了在 308 nm 激光照射下真空和 CH4 存在下对 Mn 靶材进行激光烧蚀的情况。使用门控检测和扫描单色仪的时间分辨发射以及使用腔衰荡光谱的吸收来研究蒸发羽流。在 CH4 大气中，我们观察到了被识别为 C2 和 MnH 波段的跃迁，而这些光谱特征在发射光谱中并未检测到。这是在激光汽化羽流研究中结合两种光谱技术的重要性的明确证据。