2,2,5,5-tetrakis(trimethylgermyl)octamethylpentagermane | 1238562-03-2

• 分子结构分类: 有机化合物 - 有机盐 - 有机金属盐
• 英文名称: 2,2,5,5-tetrakis(trimethylgermyl)octamethylpentagermane
• 英文别名: bis(tris(trimethylgermyl)germyl)dimethylgermane
• CAS: 1238562-03-2
• 化学式: C₂₀H₆₀Ge₉
• 分子量: 954.006
• InChiKey: PWQCVFPJZRKOBX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.25
• 重原子数：
  29.0
• 可旋转键数：
  8.0
• 环数：
  0.0
• 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

• 作为产物：
  描述：

  tris(trimethylgermyl)germyl potassium 18-crown-6 、 二氯二甲基锗 以 甲苯 为溶剂， 生成 2,2,5,5-tetrakis(trimethylgermyl)octamethylpentagermane
  参考文献：
  名称：

  σ-Bond electron delocalization of branched oligogermanes and germanium containing oligosilanes

  摘要：

  In order to evaluate the influence of germanium atoms in oligo-and polysilanes, a number of oligosilane compounds were prepared where two or more silicon atoms were replaced by germanium. While it can be expected that the structural features of thus altered molecules do not change much, the more interesting question is, whether this modification would have a profound influence on the electronic structure, in particular on the property of sigma-bond electron delocalization.The UV-spectroscopic comparison of the oligosilanes with germanium enriched oligosilanes and also with oligogermanes showed a remarkable uniform picture. The expected bathochromic shift for oligogermanes and Ge-enriched oligosilanes was observed but its extent was very small. For the low energy absorption band the bathochromic shift from a hexasilane chain (256 nm) to a hexagermane chain with identical substituent patterns (259 nm) amounts to a mere 3 nm. (C) 2014 The Authors. Published by Elsevier B. V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).

  DOI：

  10.1016/j.ica.2014.07.005

文献信息

• Polygermane Building Blocks
  作者：Johann Hlina、Judith Baumgartner、Christoph Marschner

  DOI：10.1021/om100377n

  日期：2010.11.8

  Tetrakis(trimethylgermyl)germane was prepared by the reaction of chlorotrimethylgermane and tetrabromogermane with lithium at −78 °C. Reaction with potassium tert-butoxide/18-crown-6 gave (Me3Ge)3GeK·18-crown-6, which displayed typical reactivity with electrophiles. In the reaction of (Me3Ge)3GeSiMe3 with tert-butoxide/18-crown-6 exclusive attack at the trimethylsilyl group was observed. Attempts to

  四氯锗烷和四溴锗烷与锂在-78°C下反应制得四（三甲基锗烷基）锗烷。与叔丁醇钾/ 18-crown-6反应得到（Me 3 Ge）3 GeK·18-crown-6，其与亲电试剂表现出典型的反应性。在（Me 3 Ge）3 GeSiMe 3与叔丁醇盐/ 18-冠-6的反应中，观察到三甲基甲硅烷基的排他性进攻。试图从（Me 3 Ge）3 GeGe（GeMe 3）3和2 tert获得双金属物种-丁氧化物/ 2 18-冠-6失败由于中央Ge-Ge键的分裂。然而，使用（Me 3 Si）（Me 3 Ge）2 GeGe（GeMe 3）2（SiMe 3）作为前体可接近相应的二价阴离子。