SYNTHESES AND STRUCTURES OF CYCLIC COMPLE XES ME(2)SI[ETA(5)-C5H4FE(CO)(2)](2)SNR(2)

The cyclic compounds of Me(2)Si[eta(5)-C5H4Fe (CO)(2)](2)SnR(2) [R = C l (1), Me (2), Ph(3)] were synthesized via insertion of SnCl2 to Fe-Fe bond of complex 1, Me(2)Si[eta(5)-C5H4Fe(CO)](2) (mu-CO)(2) and the r eactions of the related dianion {Me(2)Si[eta(5)-C5H4Fe(CO)(2)](2)}(2-) with R(2)SnCl(2) (R = Me, Ph). They were characterized by IR, H-1 NMR and elementary analysis. No expected product was isolated from the co rresponding reactions of complex 2, (eta(5),eta(5)-C(5)H(4)SiMe(2)OSiM e(2)C(5)H(4)) [Fe(CO)](2) (mu-CO)(2). The crystal structure of 3 was d etermined by X-ray diffraction. The crystals of 3 are monoclinic, spac e group P2(1)/n with a = 1.0384(3) nm, b = 1.6384(1) nm, c = 1.5762(5) nm and beta = 97.93(2)degrees, V = 2.656(2) nm(3), Z = 4, D-x= 1.71 g /mL. The final agreement factor, R = 0.036.