2-bromo-3,6-dimethylthieno<3,2-b>thiophene | 56412-12-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 噻吩并噻吩类
• 英文名称: 2-bromo-3,6-dimethylthieno<3,2-b>thiophene
• 英文别名: 5-Bromo-3,6-dimethylthieno[3,2-b]thiophene
• CAS: 56412-12-5
• 化学式: C₈H₇BrS₂
• 分子量: 247.18
• InChiKey: XTZNFZIYBSVDDX-UHFFFAOYSA-N

物化性质

• 熔点：
  47-48 °C
• 沸点：
  322.1±37.0 °C(Predicted)
• 密度：
  1.634±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  56.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-bromo-3,6-dimethylthieno<3,2-b>thiophene 生成 3,6-dimethyl-6H-thieno[3,2-b]thiophen-5-one
  参考文献：
  名称：

  MARTELLI G.; TESTAFERRI L.; TIECCO M.; ZANIRATO P., J. ORG. CHEM. , 1975, 40, NO 23, 3384-3391

  摘要：

  DOI：
• 作为产物：
  描述：

  3,6-dimethylthieno[3,2-b]thiophene 在 N-溴代丁二酰亚胺(NBS) 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 3.0h， 以9.5%的产率得到2,5-dibromo-3,6-dimethylthieno<3,2-b>thiophene
  参考文献：
  名称：

  3,6-二甲基噻吩并[3,2- b ]噻吩和3,6-二甲基硒代[3,2- b ]硒烯的二聚体，三聚体和四聚体的合成与表征

  摘要：

  最近已经容易获得3，6-二甲基噻吩并[3，2- b ]噻吩（1a）和3，6-二甲基硒代[3，2- b ]硒烯（1b）。从这些化合物开始，令人满意地合成了它们的二聚体，三聚体和四聚体，其中每个噻吩并噻吩单元和硒基硒烯单元均在其α位置连接，并通过UV / Vis光谱和CV氧化电势数据进行了表征。的二聚物的X射线单晶结构分析图1b显示，两名selenoloselenophene单位是与69.5大dibedral角°与扭转小号-顺式结构。

  DOI：

  10.1016/0040-4020(95)00854-3

文献信息

• LIQUID CRYSTAL COMPOSITION
  申请人：Sumitomo Chemical Company, Limited

  公开号：US20170335191A1

  公开（公告）日：2017-11-23

  A liquid crystal composition which prevents production of an alignment defect of a liquid crystal compound and also has excellent storage stability during dissolution in a solvent is provided. The liquid crystal composition is suitable for constituting a retardation film capable of favorable circular polarization conversion. The liquid crystal composition includes a polymerizable liquid crystal compound having 3 or more ring structures in the main chain, and aluminum. A content of the aluminum is 1 ppm or more and 170 ppm or less relative to the polymerizable liquid crystal compound.

  提供了一种液晶组合物，可以防止液晶化合物的对准缺陷产生，并且在溶剂中溶解时具有优异的储存稳定性。该液晶组合物适用于构成具有良好圆偏振转换的减速膜。该液晶组合物包括具有3个或更多环结构的可聚合液晶化合物和铝。铝的含量相对于可聚合液晶化合物为1 ppm或更多，170 ppm或更少。
• Chalcogens as electron donors for selected nonlinear optic phores
  作者：Martin Blenkle、Peter Boldt、Christoph Bräuchle、Walter Grahn、Isabelle Ledoux、Heiko Nerenz、Stefan Stadler、Jürgen Wichern、Joseph Zyss

  DOI：10.1039/p29960001377

  日期：——

  Three different heteroaromatic charge transfer chromophores, e.g. donor(D)acceptor(A)-substituted thieno[3,2-b]thiophenes 3 and 4, D-substituted thieno [2,3-c] pyridinium salts 7 and 2-(2'-thienyl)pyridinium salts 10 have been prepared, Alkylchalcogenic ethers were used as D-groups. The molecular first hyperpolarizabilities beta were determined by the EFISH method in the case of 3 and 4 and by the HRS method in the case of the ionic compounds 7 and 10, Substitution of the ether oxygen atom by sulfur increases markedly the beta value which is not further increased by the higher chalcogens selenium and tellurium.
• LIQUID CRYSTAL COMPOSITION, METHOD OF PRODUCING THE SAME, AND RETARDATION FILM CONSTITUTED FROM THE SAME
  申请人：Sumitomo Chemical Company, Limited

  公开号：US20170306234A1

  公开（公告）日：2017-10-26

  A liquid crystal composition is provided containing a polymerizable liquid crystal compound, the composition having high preservation stability when dissolved in a solvent and also having the ability to restrain the development of orientation defects of the liquid crystal compound. A method of producing such a liquid crystal composition is also provided with ease. The liquid crystal composition includes a first polymerizable liquid crystal compound having five or more ring structures on its principal chain and represented by the following formula (A) and a second polymerizable liquid crystal compound having five or more ring structures and represented by the following formula (B).