The reaction of NHC^DippCuCl with the silicide phases A₁₂Si₁₇ (A: K, K/Rb, Rb) in NH₃(l) yields [NHC^DippCu(η⁴-Si₉)]³⁻ (1) as only the third example of a substituted [Si₉] cluster. The corresponding salts A₃[A(2.2.2-crypt)]₃[NHC^DippCu(η⁴-Si₉)]₂·26NH₃ (A: K (1a), K/Rb (1b), Rb (1c)) crystallize isostructurally in the space group P and have been characterized by single crystal structure determination. ESI-MS and NMR experiments reveal that the anion [NHC^DippCu(η⁴-Si₉)]³⁻ can also be transferred to pyridine or acetonitrile solutions at low temperature. However, at room temperature dissociation under the release of the NHC ligand occurs. Variation of the NHC ligand in the [Cu–NHC]⁺-substituted silicide clusters is possible, whereas the reactions of K₁₂Si₁₇ with the corresponding NHC^DippMCl (M: Ag, Au) complexes result in a partial oxidation of the silicide clusters, without attachment of [M–NHC]⁺, yielding [Si₉]³⁻ species.

中文翻译：

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低氧化态的硅团簇-的合成和结构[NHC^卜先生铜（η ⁴ -Si ₉）] ^3-

NHC的反应^卜先生的CuCl与硅化物相A ₁₂的Si ₁₇（A：K，K / RB，RB）在NH ₃（升）产率[NHC^卜先生铜（η ⁴ -Si ₉）] ^3-（1），其仅是取代的[Si ₉ ]团簇的第三个例子。相应的盐甲₃ [A（2.2.2-隐窝）] ₃ [NHC^卜先生铜（η ⁴ -Si ₉）] ₂ ·26NH ₃（A：K（1A），K / RB（图1b）中，R b（1C））在空间群P中同构地结晶，并已通过确定单晶结构进行了表征。ESI-MS和NMR实验表明，该阴离子[NHC^卜先生铜（η ⁴ -Si ₉）] ^3-也可以转移到吡啶或乙腈中，在低温下的解决方案。然而，在室温下，在NHC配体释放下发生解离。[Cu–NHC] ⁺取代的硅化物簇中NHC配体的变化是可能的，而K ₁₂ Si ₁₇与相应的NHC ^{Dipp的反应}MCl（M：Ag，Au）络合物导致硅化物簇的部分氧化，而没有[M–NHC] ^+的附着，产生[Si ₉ ] ³⁻。