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Mo Insertion into the H-2 Bond in MoxSy- + H-2 Reactions

机译:Mo插入Moxsy-+ H-2反应中的H-2键

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摘要

A combined experimental and computational study of H-2 reactions with small (MoxSy-)-Mo-98 clusters ranging from subsulfide (x similar to y) to hypersulfide (y > 2x) is presented. Results suggest that the subsulfides react with H-2 primarily by insertion of a more reduced Mo center into the H-H bond, forming a dihydride product. We find that this reaction occurs up to Mo oxidation states of +4. For the subsulfides containing a second metal in a sufficiently low oxidation state, a second insertion of H-2 occurs, leading to a tetrahydride product. The reaction mechanisms of the sulfides are found to be very similar, albeit slightly higher energetically to those of the analogous oxosulfides that are also observed at low abundances in the experiments. In addition, the experimental results show an overall reduction of hypersulfides in the presence of H-2, suggesting loss of H2S neutral molecules.
机译:提出了一种与小(MOXSY - ) - Mo-98簇的H-2反应的组合实验和计算研究,其呈含有从子酰胺(类似于Y)至过硫化氢(Y> 2x)的群体。 结果表明,子硫并主要通过将更加减少的Mo中心插入H-H键的H-2反应,形成二氢盐产物。 我们发现这种反应发生在+4的Mo氧化态。 对于含有足够低的氧化状态的含有第二金属的子氟酰基,发生H-2的第二插入,导致四氢产物。 发现硫化物的反应机制非常相似,尽管在实验中的低丰度下观察到的类似氧硫化物的那些略高。 此外,实验结果表明H-2存在下的过硫化物的总体降低,表明H2S中性分子的丧失。

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