Structure and Reactivity of Distanna[2]metallocenophanes of Ruthenium and Osmium

We
report the molecular structures of 1,1′-dilithiometallocenes
of ruthenium and osmium. These compounds served as precursors for
the synthesis and subsequent structural characterization of the first
[2]­osmocenophanes with disilane and distannane bridges, as well as
of a distanna[2]­ruthenocenophane. In addition, the insertion of sulfur
and selenium into the Sn–Sn bridges was studied and it was
observed that the presence of the Lewis base pmdta (N,N,N′,N″,N″-pentamethyldiethylenetriamine)
dramatically accelerates the reaction.

本研究报道了钌与锇的1,1'-二锂代金属茂的分子结构。该类化合物可作为前驱体，用于合成首例带有二硅桥与二锡桥的[2]锇茂环蕃，以及二锡杂[2]钌茂环蕃，并完成后续的结构表征。此外，本研究还考察了硫与硒对锡-锡桥的插入反应，观测到路易斯碱pmdta（N,N,N′,N″,N″-五甲基二亚乙基三胺）可显著加速该反应的进程。