The syntheses of 1,1′-bis(chloromethyldimethylsilyl)ferrocene, fc(SiMe 2 CH 2 Cl) 2 (2), of the series of open-chain ferrocene-and silicon-containing organotin(IV) compounds 14), and of the ferrocenophanesPh) are reported, and the molecular structures of 4, 16, 17, 19, 20, 22, and 23 are described. In solution, the halogen-substituted ferrocenophanes 17-19 undergo cis-trans isomerization, the rate of which is enhanced by addition of halide ions. Variable-temperature 119 Sn and 19 F NMR studies in solution indicate that the fluoro derivatives 9, 13, and 18 react with different molar equivalents of fluoride ions to give the 1:1 and 1:2 adductsrespectively. A more extended electrochemical investigation points out that the species containing halogen-substituted tin groups are more sensitive to anions than their analogues containing diphenyltin groups.

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Here we present the synthesis of the novel organotin (IV) compounds 1-15 containing silylmethylene-spacers and ferrocene moieties. Also reported are the reactions of the methylene-bridged ditin compound 15 and the ferrocenophanes 12 and 13 with halide ions.

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