Imide and anhydride bridged organoiron dinuclear homo and hetero dichalcogeno carboxylate complexes [CpFe(CO)2ECO(C6H4)CO]2NH and [CpFe(CO)2ECO(C6H4)CO]2O; E = S, Se

Organoiron thio- and seleno-terephthaloyl chloride complexes CpFe(CO)2ECO(C6H4)COCl (E = S and Se) react with NaOH and NaNH2 to give quantitative yields of the acid Cp(CO)2ECO(C6H4)CO2H and the amide CpFe(CO)2ECO(C6H4)CONH2 respectively. These amide and acid derivatives react with the terephthaloyl chloride complexes to give a new series of imide-bridged [CpFe(CO)2ECO(C6H4)CO]2NH and anhydride-bridged [CpFe(CO)2ECO(C6H4)CO]2O organoiron dinuclear homo and hetero dichalcogeno terephthalate complexes. The complexes were characterized by elemental analysis, i.r. and 1H-n.m.r. spectra.