Abstract
Ambident Germanium Complexes In their Communication on page 13784 ff., T. Sasamori et al. show the synthesis of a chloro–ferrocenyl germanium complex by treatment of 2,5-di(3,5-tert-butylphenyl)-1-lithioferrocene with GeCl2⋅dioxane. This complex exhibited an ambident reactivity; it displayed a behavior characteristic for a dichlorogermylene anion in THF, while it exhibited the typical reactivity of a chlorogermylene in toluene. The key to the successful isolation of this germylenoid is the presence of the bulky ferrocenyl ligand with 3,5-tert-butylphenyl groups that allow effective CH−Cl interactions and, thus, raise the Ge−Cl bond dissociation energy. Single-crystal X-ray diffraction of the chlorogermylenoid, recrystallized in THF, revealed a separated-ion-pair structure in the solid state.
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