Thio- and selenosulfonato complexes of iron bearing aromatic and heterocyclic groups

Abstract Various new thio- and selenosulfonato complexes of iron were synthesized by straight forward route. Treatment of the iron chalcogenides, (μ-E x )[CpFe(CO) 2 ] 2 (E = S; x  = 2–4, E = Se; x  = 1) with sulfonyl chlorides produced the corresponding thio- or selenosulfonato complexes CpFe(CO) 2 ESO 2 Ar [Ar = 2-C 4 H 3 S ( 1 ), 5-C 4 H 2 SCl ( 2 ), 1,3-C 6 H 4 SO 2 Cl ( 3 ), 1,3-C 6 H 4 CO 2 H ( 4 ); E = S ( a ), Se ( b )]. The dimers [CpFe(CO) 2 ESO 2 ] 2 (1,3-C 6 H 4 ) ( 5 ) are obtained from the iron chalcogenides with 1,3-C 6 H 4 (SO 2 Cl) 2 in a 2:1 molar ratio. All of these new complexes have been characterized by IR, 1 H, 13 C NMR spectroscopy, UV–Vis and elemental analysis. The X-ray structure of CpFe(CO) 2 ESO 2 -1,3-C 6 H 4 SO 2 Cl ( 3a ) is determined.