1,1,2,2-tetramethyl-1,2-digermacyclopentane | 35839-71-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 金属杂环化合物
• 英文名称: 1,1,2,2-tetramethyl-1,2-digermacyclopentane
• 英文别名: 1,1,2,2-Tetramethyl-1,2-digermacyclopentan
• CAS: 35839-71-5
• 化学式: C₇H₁₈Ge₂
• 分子量: 247.4
• InChiKey: NEVGKGMUPPFWOR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.89
• 重原子数：
  9.0
• 可旋转键数：
  0.0
• 环数：
  1.0
• 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

• 作为反应物：
  描述：

  1,1,2,2-tetramethyl-1,2-digermacyclopentane 以 gas 为溶剂， 以5%的产率得到1,1-二甲基锗杂环丁烷
  参考文献：
  名称：

  Kinetics and mechanism of the thermal decomposition of 1,1-dimethylgermetane

  摘要：

  The gas-phase unimolecular decomposition of 1,1-dimethylgermetane has been investigated over the temperature range 683.9-751.2 K at pressures of ca. 15 Torr. Four products, cyclopropane, propene, ethene, and 1,1,2,2-tetramethylgermacyclopentane, are formed. Arrhenius parameters for the primary decomposition channels to (1) 1,1-dimethylgermene and ethene and (2) dimethylgermylene, cyclopropane, and propene are reported: (1) log k1/s-1 = 14.7 +/- 0.4 - 63.1 +/- 1.2 kcal mol-1/RT ln 10; (2) log k2/s-1 = 14.1 +/- 0.3 - 60.7 +/- 0.8 kcal mol-1/RT ln 10.[GRAPHICS]The surprisingly high activation energy for the 2 + 2 cycloreversion is interpreted in terms of a strong Ge-C bond dissociation enthalpy and/or reduced ring strain in the germetane.

  DOI：

  10.1021/om00046a031
• 作为产物：
  描述：

  1,1-二甲基锗杂环丁烷 以 gas 为溶剂， 以35%的产率得到1,1,2,2-tetramethyl-1,2-digermacyclopentane
  参考文献：
  名称：

  Kinetics and mechanism of the thermal decomposition of 1,1-dimethylgermetane

  摘要：

  The gas-phase unimolecular decomposition of 1,1-dimethylgermetane has been investigated over the temperature range 683.9-751.2 K at pressures of ca. 15 Torr. Four products, cyclopropane, propene, ethene, and 1,1,2,2-tetramethylgermacyclopentane, are formed. Arrhenius parameters for the primary decomposition channels to (1) 1,1-dimethylgermene and ethene and (2) dimethylgermylene, cyclopropane, and propene are reported: (1) log k1/s-1 = 14.7 +/- 0.4 - 63.1 +/- 1.2 kcal mol-1/RT ln 10; (2) log k2/s-1 = 14.1 +/- 0.3 - 60.7 +/- 0.8 kcal mol-1/RT ln 10.[GRAPHICS]The surprisingly high activation energy for the 2 + 2 cycloreversion is interpreted in terms of a strong Ge-C bond dissociation enthalpy and/or reduced ring strain in the germetane.

  DOI：

  10.1021/om00046a031

文献信息

• Kinetics and mechanism of the thermal decomposition of 1,1-dimethylgermetane
  作者：Mohammed Namavari、Robert T. Conlin

  DOI：10.1021/om00046a031

  日期：1992.10

  The gas-phase unimolecular decomposition of 1,1-dimethylgermetane has been investigated over the temperature range 683.9-751.2 K at pressures of ca. 15 Torr. Four products, cyclopropane, propene, ethene, and 1,1,2,2-tetramethylgermacyclopentane, are formed. Arrhenius parameters for the primary decomposition channels to (1) 1,1-dimethylgermene and ethene and (2) dimethylgermylene, cyclopropane, and propene are reported: (1) log k1/s-1 = 14.7 +/- 0.4 - 63.1 +/- 1.2 kcal mol-1/RT ln 10; (2) log k2/s-1 = 14.1 +/- 0.3 - 60.7 +/- 0.8 kcal mol-1/RT ln 10.[GRAPHICS]The surprisingly high activation energy for the 2 + 2 cycloreversion is interpreted in terms of a strong Ge-C bond dissociation enthalpy and/or reduced ring strain in the germetane.