Henoch Jessica, Auch Armin, Diab Fatima, Eichele Klaus, Schubert Hartmut, Sirsch Peter, Block Theresa, Pöttgen Rainer, Wesemann Lars
Institut für Anorganische Chemie , Eberhard-Karls-Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.
Institut für Anorganische und Analytische Chemie , Universität Münster , Corrensstrasse 30 , D-48149 Münster , Germany.
Inorg Chem. 2018 Apr 2;57(7):4135-4145. doi: 10.1021/acs.inorgchem.8b00317. Epub 2018 Mar 21.
1,1'-Dilithioferrocene was reacted with 2 equiv of isopropyl (Ar*) or methyl (Ar') substituted terphenyl tin(II) chloride. Reaction product 1, carrying the bulkier terphenyl substituent Ar*, displays a bis(stannylene) structure in the solid state without formation of a tin-tin bond. Temperature-dependent solution Sn NMR spectroscopy, however, revealed a dynamic interplay between bis(stannylene) (100 °C) and cyclic distannene (-80 °C). In contrast to 1, the less bulky Ar' substituent results in a cyclic distannene 2. On the basis of temperature-dependent Sn NMR spectroscopy the Sn-Sn bond of compound 2 was preserved up to 100 °C. Both compounds were further characterized by solid-state Sn NMR spectroscopy as well as Sn and Fe Mössbauer spectroscopy. 1 reacted as a chelating ligand with nickel and palladium complexes [Ni(cod)] and [Pd(nbe)] (nbe = norbornene). In the resulting coordination compounds the nonstabilized stannylene acts as a donor as well as an acceptor ligand and shows a dynamic switch from donor to acceptor behavior in the monopalladium complex.
1,1'-二锂代二茂铁与2当量的异丙基（Ar*）或甲基（Ar'）取代的三联苯锡（II）氯化物反应。带有较大三联苯取代基Ar*的反应产物1在固态下呈现双（亚锡烯）结构，未形成锡-锡键。然而，温度依赖的溶液锡核磁共振光谱显示，双（亚锡烯）（100℃）与环状二锡烯（-80℃）之间存在动态相互作用。与1相反，较小的Ar'取代基导致环状二锡烯2的形成。基于温度依赖的锡核磁共振光谱，化合物2的锡-锡键在高达100℃时得以保留。这两种化合物都通过固态锡核磁共振光谱以及锡和铁穆斯堡尔光谱进行了进一步表征。1作为螯合配体与镍和钯配合物[Ni(cod)]和[Pd(nbe)]（nbe = 降冰片烯）反应。在所得的配位化合物中，未稳定化的亚锡烯既作为供体配体又作为受体配体，并且在单钯配合物中显示出从供体行为到受体行为的动态转变。
