ORGANOMETAL PROTECTION GROUPS FOR FORMATI ON OF UNUSUAL TIN-CHALCOGENCAGE COMPOUNDS - THIOSTANNATE(II) SN3S4(2-) AND TIN OXIDE HYDRATE SN6(MU-3-OH)4(MU-3-O)4 AS LIGANDS IN (R)CP(CO)2MN COMPLEXES

Thiostannates(II) are considered typical solid state compounds. Isolat ion of the thiostannate(II) Sn3S42- as a molecular entity is achieved by a priori protecting the tin building blocks with RCp(CO)2Mn moietie s. The cubane-type (R)Cp(CO)2Mn-protected cage molecules [Na-[2,2,2]Kr yptand][{(Cp(CO)2MnSn)3S4}Na(THF)3] (1a) and [{(Cp(CO)2MnSn)3S4)Mn(TH F)3] (1b) have been prepared and fully characterized. As an example of a (R)Cp(CO)2Mn protected rhombic dodecahedral cage molecule [(Cp(CO) 2Mn-Sn)6(mu3-O)4(mu3-OH)4] (2) has been obtained. X-Tay analysis of 2 shows that the Sn6(mu3-OH)4(mu3-O)4 cage of the formal ''tin-oxide-hyd rate'', ''Sn3O3 . H2O'', acts as a ligand towards six Cp(CO)2Mn units via the stereochemically active ''lone-pairs'' at the tin(II) centres .