A Bis(germyliumylidene)silver(I) Complex Dication

The reaction of the 2,6-bis­(imino)­phenylchlorogermylene [LGeCl] (1, L = C6H3-2,6-(HC​NtBu)2) with silver­(I) trifluoromethanesulfonate (AgOTf) in a molar ratio of 2:3 in toluene afforded a mixture of the bis­(germylene)­silver­(I) complex [{L­(TfO)­Ge}2­Ag­(OTf)] (2) and AgCl. Compound 2 was then reacted with 2 equiv of 1,3-dimethyl-4,5-dimethylimidazol-2-ylidene (IMe, :C­{N­(Me)­C­(Me)}2) in toluene to afford 3, which comprises the bis­(germyliumylidene)­silver­(I) complex dication [{L­(IMe)­Ge}2­Ag­(OTf)]2+. Compounds 2 and 3 were characterized by NMR spectroscopy and X-ray crystallography. [{L­(IMe)­Ge}2­Ag­(OTf)]2+ in compound 3 was further elucidated by DFT studies.将2,6-双(亚氨基)苯基氯锗烯[LGeCl]（化合物1，其中L = C₆H₃-2,6-(HC=NtBu)₂）与三氟甲磺酸银(silver(I) trifluoromethanesulfonate, AgOTf)以2:3的摩尔比在甲苯中反应，得到双(锗烯)银(I)配合物[{L(OTf)Ge}₂Ag(OTf)]（化合物2）与氯化银的混合物。随后将化合物2与2当量的1,3-二甲基-4,5-二甲基咪唑-2-叶立德（1,3-dimethyl-4,5-dimethylimidazol-2-ylidene, IMe，:C{N(Me)C(Me)}₂）在甲苯中反应，得到化合物3，其包含双(锗亚鎓亚基)银(I)配合物二阳离子[{L(IMe)Ge}₂Ag(OTf)]²⁺。通过核磁共振(Nuclear Magnetic Resonance, NMR)光谱学与X射线晶体学(X-ray Crystallography)对化合物2与3进行了表征。化合物3中的[{L(IMe)Ge}₂Ag(OTf)]²⁺还通过密度泛函理论(Density Functional Theory, DFT)研究进行了进一步阐释。