Main-group-element compounds with energetically high-lying donor and low-lying acceptor orbitals are able to mimic chemical bonding motifs and reactivity patterns known in transition metal chemistry, including small-molecule activation and catalytic reactions. Monovalent group 13 compounds and divalent group 14 compounds, particularly silylenes, have been shown to be excellent candidates for this purpose. However, one of the most common reactions of transition metal complexes, the direct reaction with carbon monoxide and formation of room-temperature isolable carbonyl complexes, is virtually unknown in main-group-element chemistry. Here, we show the synthesis, single-crystal X-ray structure, and density functional theory computations of a room-temperature-stable silylene carbonyl complex [L(Br)Ga]2Si:-CO (L = HC[C(Me)N(2,6-iPr2-C6H3)]2), which was obtained by direct carbonylation of the electron-rich silylene intermediate [L(Br)Ga]2Si:. Furthermore, [L(Br)Ga]2Si:-CO reacts with H2 and PBr3 with bond activation, whereas the reaction with cyclohexyl isocyanide proceeds with CO substitution.

中文翻译：

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羰基硅复合物在室温下稳定。

具有高能级供体轨道和低能级受体轨道的主族元素化合物能够模拟过渡金属化学中已知的化学键基序和反应模式，包括小分子活化和催化反应。单价的第13族化合物和二价的第14族化合物，特别是甲硅烷基，已被证明是用于此目的的极好的候选物。但是，过渡金属络合物最常见的反应之一是与一氧化碳的直接反应以及室温下可分离的羰基络合物的形成，在主族元素化学中几乎是未知的。在这里，我们显示了室温稳定的甲硅烷基羰基配合物[L（Br）Ga] 2Si：-CO（L = HC [C（Me））的合成，单晶X射线结构和密度泛函理论计算N（2,6-iPr2-C6H3）] 2），通过富电子的亚甲硅中间体[L（Br）Ga] 2Si：的直接羰基化获得。此外，[L（Br）Ga] 2Si：-CO与H2和PBr3进行键活化反应，而与环己基异氰化物的反应则进行CO取代。