MeMgH | 63533-51-7

• 英文名称: MeMgH
• 英文别名: Methylmagnesiumhydrid
• CAS: 63533-51-7
• 化学式: CH₄Mg
• 分子量: 40.3478
• InChiKey: FIQTYQATVKFKCV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.06
• 重原子数：
  2.0
• 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：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为反应物：
  描述：

  lithium;dimethylalumanuide 、 MeMgH 以 四氢呋喃 为溶剂， 生成 、
  参考文献：
  名称：

  二甲基镁与氢化锂铝在乙醚和四氢呋喃中的反应

  摘要：

  详细研究了氢化铝锂与二甲基镁在乙醚和THF中的反应。当（CH3）2-Mg和LiAlH4在乙醚中以4：1至1：2的摩尔比反应时，形成氢化镁，为不溶性固体。通过红外和NMR光谱比较，确定LiAlH4与LiAl（ CH3）4。另一方面，在（CH3）2Mg与LiAlH4在THF中的比例为4：1的反应中，发现含有CH3MgH和LiAl（CH3）4的混合物的澄清溶液。以2：1的比例进行反应，生成的CH3Mg2H3和LiAlH（CH3）3在THF溶液中的混合物。将LiAlH4进一步添加到THF中的（CH3）2Mg中，生成不溶的MgH2。

  DOI：

  10.1016/s0020-1693(00)83621-x
• 作为产物：
  描述：

  methane 、 magnesium 以 solid matrix 为溶剂， 生成 MeMgH
  参考文献：
  名称：

  Photophysics of atomic magnesium isolated in solid methane and perdeuteromethane. III. Evidence for a kinetic isotope effect in the competitive process of atomic magnesium insertion into a C–H bond

  摘要：

  The formation of the C–H bond insertion product methylmagnesium hydride (CH3MgH) and the simultaneous emission of atomic triplet magnesium are observed following photoexcitation of the first allowed singlet resonance transition of atomic magnesium isolated in solid methane matrices at 12 K. Isotopic variation of the solid methane hosts produces observable differences in the relative branching ratios into the photophysical (atomic triplet emission) and photochemical (insertion product formation) channels. In solid perdeuteromethane (CD4), the intensity of the atomic emission is approximately five times that in solid methane (CH4) while the rate of formation of the insertion product shows the opposite behavior in the two solids. No singlet atomic magnesium emission is observed in the solid Mg/methane systems and the rise time of the atomic triplet emission is deduced to occur on a time scale of less than 10 ns. A simple model derived from spin and orbital correlations between reactants and products is presented which considers the effect of the low symmetry of an insertive reaction coordinate in the approach geometry of atomic magnesium to methane yielding the linear product CH3MgH. Using this model, the absence of the singlet atomic emission is explained in terms of the attractive nature of the singlet surface with respect to the formation of a bent, inserted intermediate. The observation of an enhanced rate of atomic magnesium intersystem crossing is thought to occur as a result of the symmetry-induced participation of the repulsive triplet surface in the process leading to the linear insertion product. The model also suggests an origin for the observed kinetic isotope effects. Differences in the observed behavior of the 1P state of atomic magnesium in gas-phase and solid-phase quenching experiments (explicitly the formation of fragmented products only with no unreacted atomic triplet in the former case and the formation of the insertion product with intense atomic triplet emission in the latter) are discussed in relation to the presence of efficient relaxation pathways in the solid phase and the absence of such pathways in the single-collision conditions of the gas-phase experiments.

  DOI：

  10.1063/1.455133
• 作为试剂：
  描述：

  辛烯 在 二氯二茂钛 、 MeMgH 作用下， 以 四氢呋喃 为溶剂， 生成 正辛烷
  参考文献：
  名称：

  用格氏试剂对1-辛烯进行加氢金属化。二环戊二烯基二氯化钛催化的烷基镁和氢化烷基镁

  摘要：

  通过一系列Grignard试剂（EtMgCl，EtMgBr，n-PrMgCl，i-PrMgCl，n-BuMgCl，sec-BuMgCl，iso-BuMgCl，iso-BuMgBr和iso-BuMgI），二烷基镁化合物（Me 2 Mg，Et 2 Mg，n-Pr 2 Mg，iso-Pr 2 Mg，n-Bu 2 Mg，sec-Bu 2 Mg，iso-Bu 2 Mg和t-Bu 2 Mg），氢化烷基镁（RMgH，其中R = Me，Et，T-Bu，Cp和Ph）和氢化镁（MgH 2，HMgCl和HMgBr）在5 mol％二环戊二烯基二氯化钛（Cp 2 TiCl 2）的四氢呋喃溶液已被研究。绘制了几个反应的辛烷值的百分率（产物水解产生的）与时间的关系图，以比较各个试剂的作用。尽管t-Bu 2 Mg产生了异构化的起始原料，但大多数具有β氢原子的烷基镁化合物主要产生加氢金属化产物。在反应混合物水解时，MeMg

  DOI：

  10.1016/0022-328x(83)85035-9

文献信息

• GOEL A. B., D1INDIAN J. CHEM., 1978, A 16, NO 6, 491-49
  作者：GOEL A. B.

  DOI：——

  日期：——