germanium tetramethoxide

• 分子结构分类: 有机化合物 - 有机盐 - 有机金属盐
• 英文名称: germanium tetramethoxide
• 英文别名: germanium(IV) methoxide
• 化学式: 4CH₃O*Ge
• 分子量: 196.727
• InChiKey: KSBFQCCGSZAOQU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.4
• 重原子数：
  3.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  23.06
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  germanium tetramethoxide 、 iron(II) acetate 以 甲醇 、 水 为溶剂， 生成
  参考文献：
  名称：

  Structural and magnetic characterization of aerogel-produced Ge0.5Fe2.5Oy nanoparticles

  摘要：

  Fine powders of Ge0.5Fe2.5Oy with nearly uniform grain size were synthesized through the sol-gel supercritical drying technique, and were characterized by XRD, TEM, SQUID, and Mossbauer spectroscopy. Each grain is comprised of a spinel-crystallite core of mean size 11.2 nm and a thin amorphous shell. Such a complex structure yields collinear ferrimagnetism in the core and canted ferrimagnetism with multiple configurations in the shell. At low temperatures, the low-field dependence of magnetization as it approaches saturation suggests the presence of a weak random anisotropy, and the high-field dependence suggests an increase in the magnetic moments of molecules. Both tetrahedral and octahedral sites are occupied by Ge4+ and Fe, mainly trivalent, cations. The charge balance is presumably provided by cation and/or anion vacancies. (C) 2000 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0304-8853(99)00812-4

文献信息

• Spirocyclic bisphenoxides of Ge, Zr, and Sn as catalysts for ring-expansion polymerizations of <scp>l</scp> - and meso-lactide
  作者：Steffen M. Weidner、Hans R. Kricheldorf

  DOI：10.1002/pola.29259

  日期：2018.12.15

  germanium, zirconium, and tin were prepared from 2,2′‐dihydroxybiphenyl and 2,2′‐dihydroxy‐1,1′‐binaphthyl. Ring‐expansion polymerizations of l‐lactide are mainly studied at 160 or 180 °C. The reactivity of the catalysts increases in the order: Zr < Ge < Sn. Regardless of catalyst, the weight‐average molecular weights (Mw) never exceed 50,000 g mol−1. The resulting poly(l‐lactide)s are optically pure and

  锗，锆和锡的螺环酚盐是由2,2'-二羟基联苯和2,2'-二羟基-1,1'-联萘制备的。的扩环聚合升丙交酯被主要研究在160或180℃。催化剂的反应性按以下顺序增加：Zr 120°C时产生相似的结果，但在100或80°C时产生不同的结果。出乎意料的是，在<140°C时获得了钟形的窄分子量分布，类似于酒精引发的聚合反应中的活性聚合反应模式。还发现了一种不寻常的酯交换机制，可产生奇数个周期的窄分布。©2018 Wiley Periodicals，Inc.J.Polym。科学，A部分：Polym。化学 2018，56，2730年至2738年