[[2,4,6-tris[bis(trimethylsilyl)methyl]phenyl]-(2,4,6-trimethylphenyl)germylidene]pentacarbonyltungsten(0) | 450373-65-6

• 英文名称: [[2,4,6-tris[bis(trimethylsilyl)methyl]phenyl]-(2,4,6-trimethylphenyl)germylidene]pentacarbonyltungsten(0)
• CAS: 450373-65-6
• 化学式: C₄₁H₇₀GeO₅Si₆W
• 分子量: 1067.96
• InChiKey: CPARXIRPNWAFKO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  (E)-1,2-dimesityl-1,2-bis[2,4,6-tris(bis(trimethylsilyl)methyl)phenyl]digermene 、 tungsten pentacarbonyl tetrahydrofuran 以 四氢呋喃 为溶剂， 以31%的产率得到[[2,4,6-tris[bis(trimethylsilyl)methyl]phenyl]-(2,4,6-trimethylphenyl)germylidene]pentacarbonyltungsten(0)
  参考文献：
  名称：

  Synthesis and characterization of an extremely hindered tetraaryl-substituted digermene and its unique properties in the solid state and in solution

  摘要：

  An extremely hindered digermene (E)-Tbt(Mes)Ge-Ge(Mes)Tbt (1; Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl; Mes = mesityl) was synthesized. X-ray crystallographic analysis of the hexane solvated single crystal [1(.)0.5hexane] revealed that I has an extremely long germanium-germanium double bond [2.416(2) A] as that of a carbon-substituted digermene. The temperature-dependent change of UV-Vis absorption of digermene I in solution indicated the quantitative interconversion between 1 and the corresponding germylene Tbt(Mes)Ge: (3). The thermodynamic parameters (DeltaH = 14.7 +/- 0.2 kcal mol(-1) and AS = 42.4 +/- 0.8 cal mol(-1) deg(-1)) for the dissociation of digermene I to germylene 3 were obtained from temperature dependence of the absorption of 1. Since the reactivity of germylene 3 is much higher than that of digermene 1, almost all the intermolecular reactions of I in solution proceeded via dissociated 3. For instance, the reaction of 1 with oxygen in solution resulted in a non-stereospecific formation of the cis- and trans-1,3,2,4-dioxadigermetanes 11 and 7 via the initial formation of germanone 12 derived from oxygenation of the dissociated germylene 3. In case of the oxidation in the solid state, however, digermene 1 reacted with O-2 without dissociation to give the corresponding trans-substituted 1,3,2,4-dioxadigermetanes stereospecifically. The reaction of digermene 1 with W(CO)(5)(THF) was also examined to give the corresponding terminal tungsten complex of the dissociated germylene 3, i.e. Tbt(Mes)Ge=W(CO)(5) (23), as a marginally stable orange yellow paste. (C) 2002 Published by Elsevier Science Ltd.

  DOI：

  10.1016/s0277-5387(01)01035-x