2-Cyclopenta[2,1-b | 143736-80-5

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2-Cyclopenta[2,1-b
• 英文别名: dimethyl 2-(3,11-dithiatricyclo[6.3.0.02,6]undeca-1(8),2(6),4,9-tetraen-7-ylidene)-1,3-dithiole-4,5-dicarboxylate
• CAS: 143736-80-5
• 化学式: C₁₆H₁₀O₄S₄
• 分子量: 394.517
• InChiKey: UHDORDOYICOYKC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  24
• 可旋转键数：
  4
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  160
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为产物：
  描述：

  4H-环戊并[2,1-B:3,4-B']二噻吩-4-酮 、 2-(dimethoxyphosphoryl)-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester 在 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 以91%的产率得到2-Cyclopenta[2,1-b
  参考文献：
  名称：

  Preparation and properties of novel polythiophenes containing 1,3-dithiol-2-ylidene moieties

  摘要：

  4-(1,3-Dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophenes 1 and 7-(1,3-dithiol-2-ylidene)-7H-cyclopenta[l,2-b;4,3-b'] dithiophenes 2 were prepared by Wittig-Horner or Wittig reactions. The X-ray structural analyses of the parent compounds 1a and 2a reveal that both molecules have planar structures with short intermolecular S...S contacts, and 2a additionally has short intramolecular S...S contacts. They have low oxidation potentials and absorptions in a long wavelength region due to the 1,3-dithiole skeleton. Electrochemical oxidation of 1 and 2 afforded the corresponding polymers 3 and 4, which have low oxidation potentials. Electrochemically dedoped films of 3 and 4 have interband absorptions at 610-690 nn and 420-590 nm, respectively, in their electronic spectre. Some films of 3 and 4 exhibited high electrical conductivities with doping, for instance, 3c.(PF6-)(x) 33 S cm(-1) and 3e.(BF4-)(x), 52 S cm(-1). Derivatives 3f-h, containing linear alkyl chains, were synthesized in order to enhance solubilities in organic solvents and were found to be somewhat soluble in THF and chloroform. Dedoped 3g showed broad peaks in the H-1 NMR spectrum, assigned to the alkyl protons. MNDO-PM3 calculations showed that the torsion angles between the neighbor monomer fragments in the dimers and trimers of 1a and 2a are about 30 degrees. However, the oligomers derived from 1a have more extended conjugated systems than those from 2a, which was indicated by INDO/1 calculations.

  DOI：

  10.1021/jo00081a026

文献信息

• Preparation and properties of poly-4-(1,3-dithiol-2-ylidene)-4H-cyclopenta[2,1-b; 3,4-b′]dithiophene and its derivatives
  作者：Masatoshi Kozaki、Shoji Tanaka、Yoshiro Yamashita

  DOI：10.1039/c39920001137

  日期：——

  The title polymers, prepared by an electrochemical oxidation of the corresponding 1,3-dithiole derivatives with low oxidation potentials, exhibit high conductivities by doping.

  通过电化学氧化低氧化势的相应1,3-二硫杂环戊二烯衍生物
• Preparation and properties of novel polythiophenes containing 1,3-dithiol-2-ylidene moieties
  作者：Masatoshi Kozaki、Shoji Tanaka、Yoshiro Yamashita

  DOI：10.1021/jo00081a026

  日期：1994.1

  4-(1,3-Dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophenes 1 and 7-(1,3-dithiol-2-ylidene)-7H-cyclopenta[l,2-b;4,3-b'] dithiophenes 2 were prepared by Wittig-Horner or Wittig reactions. The X-ray structural analyses of the parent compounds 1a and 2a reveal that both molecules have planar structures with short intermolecular S...S contacts, and 2a additionally has short intramolecular S...S contacts. They have low oxidation potentials and absorptions in a long wavelength region due to the 1,3-dithiole skeleton. Electrochemical oxidation of 1 and 2 afforded the corresponding polymers 3 and 4, which have low oxidation potentials. Electrochemically dedoped films of 3 and 4 have interband absorptions at 610-690 nn and 420-590 nm, respectively, in their electronic spectre. Some films of 3 and 4 exhibited high electrical conductivities with doping, for instance, 3c.(PF6-)(x) 33 S cm(-1) and 3e.(BF4-)(x), 52 S cm(-1). Derivatives 3f-h, containing linear alkyl chains, were synthesized in order to enhance solubilities in organic solvents and were found to be somewhat soluble in THF and chloroform. Dedoped 3g showed broad peaks in the H-1 NMR spectrum, assigned to the alkyl protons. MNDO-PM3 calculations showed that the torsion angles between the neighbor monomer fragments in the dimers and trimers of 1a and 2a are about 30 degrees. However, the oligomers derived from 1a have more extended conjugated systems than those from 2a, which was indicated by INDO/1 calculations.