syn-1,1'-bi-2-cyclohexenylidene | 132911-35-4

• 分子结构分类: 有机化合物 - 碳氢化合物 - 不饱和烃
• 英文名称: syn-1,1'-bi-2-cyclohexenylidene
• 英文别名: (Z)-3,3'-Bis-(1-cyclohexenylidene)；(3Z)-3-cyclohex-2-en-1-ylidenecyclohexene
• CAS: 132911-35-4
• 化学式: C₁₂H₁₆
• 分子量: 160.259
• InChiKey: IMTIYIKRBGNQTQ-QXMHVHEDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 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：

  syn-1,1'-bi-2-cyclohexenylidene 以 氘代苯 为溶剂， 生成 anti-1,1'-bi-2-cyclohexenylidene
  参考文献：
  名称：

  Thermal cis-trans rearrangement of semirigid polyenes as a model for the anticarcinogen .beta.-carotene: an all-trans-pentaene and an all-trans-heptaene

  摘要：

  To assess the possible role of a 15,15' 90-degrees-twisted, singlet diradical in the anticarcinogenicity of beta-carotene, activation parameters for the thermal, cis-trans interconversion of all-trans-beta-carotene (1) and 15,15'-cis-beta-carotene (2), polyenes of order 11, are needed. Indirect achievement of this goal is initiated here by determining activation parameters for cis-trans rearrangement in a set of semirigid, all-trans-polyenes of order 3, 5, and 7 (9 to follow). These data also provide a test of theoretical calculations of stabilization energies of polyenyl radicals. For the coherent series, 3(1,1,1), 5(2,1,2), and 7(3,1,3), these activation parameters (DELTA-H double-ended-dagger (kcal/mol), DELTA-S double-ended-dagger (cal/mol.K)) are found: 38.9, -6.0; 32.1, -4.4; 27.5, -4.4. The trend is a diminishing return as the order is increased. ''Stabilization energies'', defined as extra stabilization associated with delocalization of the odd electron and derived with allyl as the reference point (SE1 = 13.5 kcal/mol), are pentadienyl, SE2 = 16.9 kcal/mol, and heptatrienyl, SE3 = 19.2 kcal/mol. Heptaene 7 rearranges in a range, 64-104-degrees-C, that is close enough to 37-degrees-C to forewarn of thermal lability of beta-carotene in cell membranes.

  DOI：

  10.1021/ja00011a036
• 作为产物：
  描述：

  anti-1,1'-bi-2-cyclohexenylidene 生成 syn-1,1'-bi-2-cyclohexenylidene
  参考文献：
  名称：

  Doering, William von E.; Roth, Wolfgang R.; Bauer, Frank, Chemische Berichte, 1991, vol. 124, # 6, p. 1461 - 1470

  摘要：

  DOI：

文献信息

• Doering, William von E.; Roth, Wolfgang R.; Bauer, Frank, Chemische Berichte, 1991, vol. 124, # 6, p. 1461 - 1470
  作者：Doering, William von E.、Roth, Wolfgang R.、Bauer, Frank、Boenke, Martin、Breuckmann, Rolf、et al.

  DOI：——

  日期：——
• DOERING, W. E. VON;KITAGAWA, TOSHIKAZU, J. AMER. CHEM. SOC., 113,(1991) N1, C. 4288-4297
  作者：DOERING, W. E. VON、KITAGAWA, TOSHIKAZU

  DOI：——

  日期：——
• Thermal cis-trans rearrangement of semirigid polyenes as a model for the anticarcinogen .beta.-carotene: an all-trans-pentaene and an all-trans-heptaene
  作者：W. v. E. Doering、Toshikazu Kitagawa

  DOI：10.1021/ja00011a036

  日期：1991.5

  To assess the possible role of a 15,15' 90-degrees-twisted, singlet diradical in the anticarcinogenicity of beta-carotene, activation parameters for the thermal, cis-trans interconversion of all-trans-beta-carotene (1) and 15,15'-cis-beta-carotene (2), polyenes of order 11, are needed. Indirect achievement of this goal is initiated here by determining activation parameters for cis-trans rearrangement in a set of semirigid, all-trans-polyenes of order 3, 5, and 7 (9 to follow). These data also provide a test of theoretical calculations of stabilization energies of polyenyl radicals. For the coherent series, 3(1,1,1), 5(2,1,2), and 7(3,1,3), these activation parameters (DELTA-H double-ended-dagger (kcal/mol), DELTA-S double-ended-dagger (cal/mol.K)) are found: 38.9, -6.0; 32.1, -4.4; 27.5, -4.4. The trend is a diminishing return as the order is increased. ''Stabilization energies'', defined as extra stabilization associated with delocalization of the odd electron and derived with allyl as the reference point (SE1 = 13.5 kcal/mol), are pentadienyl, SE2 = 16.9 kcal/mol, and heptatrienyl, SE3 = 19.2 kcal/mol. Heptaene 7 rearranges in a range, 64-104-degrees-C, that is close enough to 37-degrees-C to forewarn of thermal lability of beta-carotene in cell membranes.