Einige Reaktionen an der Eisen-Eisen-Bindung om Tetracarbonyl(1,1',3,3'-tetra-tert-butyl-5,5'-pentafulvalen)dieisen

Article abstract of DOI:10.1016/0022-328X(91)83287-E

Reactions of tetracarbonyl(1,1',3,3'-tetra-tert-butyl-5,5'-pentafulvalene)diiron (1) with the halides bromine and iodine, and with the reagent HCl/O2, respectively, lead under cleavage of the iron-iron bond to the fulvalene-bridged dinuclear dicarbonyl-halide complexes (η⁵:η⁵-^tBu4C10H4)(CO)4Fe2X2, with X=Br (2), I (3), and Cl (4).By reaction of 3 with the nucleophiles CH3MgI, C6H5CH2MgBr and C5H5Na, compounds of the type (η⁵:η⁵-^tBu4C10H4)(CO)4Fe2R2 with R=CH3 (5).CH2C6H5 (6), and C5H5 (7) are formed.Treatment of 1 with potassium graphite, C8K, yields the dipotassium diferrate 8.Reactions of 8 with AsBr3 and SbBr3, respectively, lead to the metal complexes (η⁵:η⁵-^tBu4C10H4)(CO)4Fe2(ElBr2)2 with El=As (9), and Sb (10).It can be asumed that in all derivatives of 1 a cisoid orientation of the iron centers is maintained.