Insertion of iron carbonyl into a CS bond of tetrathiofulvalene

Abstract Irradiation of a mixture of tetrathiofulvalene (TTF) and iron pentacarbonyl in THF gives a dinuclear hexacarbonyl iron chelate, Fe 2 (CO) 6 [μ-SC( CSCHCHS )SCHCH] ( 1 ), by ring-opening of TTF adjacent to an internal double bond. The donated ligand electrons originate from an sp 2 carbon atom, a sulphur atom, and a carbon—carbon double bond.