3,5-二甲基-1,3,4-噻二唑-2(3H)-硫酮 | 7111-96-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 3,5-二甲基-1,3,4-噻二唑-2(3H)-硫酮
• 英文名称: 2,4-Dimethyl-5-thioxo-1,3,4-thiadiazolin
• 英文别名: 1,3,4-Thiadiazole-2(3H)-thione, 3,5-dimethyl-；3,5-dimethyl-1,3,4-thiadiazole-2-thione
• CAS: 7111-96-8
• 化学式: C₄H₆N₂S₂
• 分子量: 146.237
• InChiKey: SXGPSEUHDNWBQE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  73
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3,5-二甲基-1,3,4-噻二唑-2(3H)-硫酮 、 碘甲烷 以 丙酮 为溶剂， 生成
  参考文献：
  名称：

  Specific Molecular Orbital Contributions to Nucleophilicity. The Thiocarbonyl Group as Priviledged Monitor to Pinpoint Active and Less Active Molecular Orbitals in Reactions with Methylating Agents

  摘要：

  The rate constants for 41 compounds bearing a C=S function reacting with MeX (X = I, Tos) span 7 orders of magnitude. The PES spectra of these compounds display two very low energy peaks, which stand clearly apart from the other peaks. These two peaks correspond to the pi orbitals of the C-S group; one is its CS pi bonding orbital oriented out of the molecular plane (pi(CS)) and the other its p-type in-plane lone pair orbital (pi(S)). For some of the compounds, the HOMO is the pi(CS) orbital and for others the HOMO is the ns lone pair orbital. The best correlation (R = 0.96) between rate constants h and PES data is obtained when In(k) is plotted against the inverse of PES energy of the pi(S) lone pair orbital. Whether this lone pair orbital is the HOMO or the next lower HOMO has no importance. A modest correlation (R = 0.78) is obtained when In(k) is plotted against the inverse of PES energy of the pi(CS) bonding orbital, An attempt to correlate the calculated energy of the third highest occupied orbital (from AM1 calculations) with In(h) provides a complete scattering of data (R < 0.1), but the calculated energy of the second lone pair orbital sigma(S) (approximate to 90 kcal mol-l deeper than the HOMO) correlates reasonably with In(h) (R = 0.88). The energies of the S 2s and 2p core orbitals (calculated for 13 cyclic compounds with the HF/3-21G technique to be 4000 to 5500 kcal mol(-1) deeper than HOMO) correlate with In(k) (R = 0.86) as well as does that of the second lone pair orbital os. These results are the first where both frontier orbitals and core orbitals display correlation with overall reactivity. They are discussed in terms of direct (perturbational) versus indirect (nonperturbational) concepts.

  DOI：

  10.1021/jo00113a010
• 作为产物：
  描述：

  N'-acetyl-N-methyl-hydrazinecarbodithioic acid methyl ester 在 三氯氧磷 作用下， 生成 3,5-二甲基-1,3,4-噻二唑-2(3H)-硫酮
  参考文献：
  名称：

  Sandstroem,J.; Wennerbeck,I., Acta Chemica Scandinavica (1947), 1966, vol. 20, p. 57 - 71

  摘要：

  DOI：

文献信息

• Kier,L.B.; Scott,M.K., Journal of Heterocyclic Chemistry, 1968, vol. 5, p. 277 - 279
  作者：Kier,L.B.、Scott,M.K.

  DOI：——

  日期：——

表征谱图