The methylgermylene species (HGeCH₃; X¹A′) has been synthesized via the bimolecular gas phase reaction of ground state methylidyne radicals (CH) with germane (GeH₄) under single collision conditions in crossed molecular beams experiments. Augmented by electronic structure calculations, this elementary reaction was found to proceed through barrierless insertion of the methylidyne radical in one of the four germanium‐hydrogen bonds on the doublet potential energy surface yielding the germylmethyl (CH₂GeH₃; X²A′) collision complex. This insertion is followed by a hydrogen shift from germanium to carbon and unimolecular decomposition of the methylgermyl (GeH₂CH₃; X²A′) intermediate by atomic hydrogen elimination leading to singlet methylgermylene (HGeCH₃; X¹A′). Our investigation provides a glimpse at the largely unknown reaction dynamics and isomerization processes of the carbon‐germanium system, which are quite distinct from those of the isovalent carbon system thus providing insights into the intriguing chemical bonding of organo germanium species on the most fundamental, microscopic level.

中文翻译：

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甲基亚锗烯（HGeCH3）的气相形成。

在单分子碰撞条件下，通过交叉分子束实验，通过基态亚甲基自由基（CH）与锗烷（GeH ₄）的双分子气相反应，合成了甲基亚锗烯类（HGeCH ₃； X ¹ A'）。通过电子结构计算的增强，发现该基本反应是通过在二重态势能表面上的四个锗-氢键之一无阻插入亚甲基自由基而进行的，从而产生了methyl甲基（CH ₂ GeH ₃； X ² A'）碰撞复杂。插入后，氢从锗转变为碳，并且甲基锗（GeH ₂ CH₃；X ² A'）通过原子氢消除中间体形成单线态甲基亚锗烯（HGeCH ₃； X ¹ A'）。我们的研究提供了对碳锗系统很大程度上未知的反应动力学和异构化过程的一瞥，这与等价碳体系截然不同，从而提供了对有机锗物种在最基本的微观上令人着迷的化学键合的认识。水平。