1,1 '-bis(stannyl)- and 1,1 '-bis(chlorostannyl)ferrocenes studied by multinuclear magnetic resonance, temperature-dependent Fe-57- and Sn-119-Mossbauer spectroscopy, and electrochemistry

The 1,1'-bis(chlorostannyl)-substituted ferrocenes Fe(C5H4-SnMe2Cl)(2) (2), Fe(C5H4-SnMeCl2)(2) (3) and Fe(C5H4-SnCl3)(2) (4) were prepared, starting from 1,1'-bis(trimethylstannyl)ferrocene (1). Treatment of the chlorides wi th Li[AlH4] afforded the 1,1'-bis (hydridostannyl) -subsituted ferrocenes F e(C5H4-SnMe2H)(2) (5), Fe(C5H4-SnMeH2)(2) (6) and Fe(C5H4-SnH3)(2) (7), res pectively. All complexes 1-7 were studied by H-1-, C-13-, and Sn-119-NMR sp ectroscopy with ID and 2D techniques. The compounds 1-4 were investigated b y temperature-dependent Sn-119- and Fe-57-Mossbauer spectroscopy. The elect rochemistry of 1-5 gave evidence of reversible one-electron oxidation proce sses. The molecular structure of 1,1'-bis(trichlorostannyl)ferrocene (4) wa s determined by X-ray structural analysis, and there was no indication of i ntra- or intermolecular Sn ... Cl ... Sn interactions. This direct structur al information proved to be consistent with both the Mossbauer and the solu tion NMR spectroscopic data.