Neutral and monocationic dinuclear (carbonyl)(cyclopentadienyl)(phenylchalcogenate) iron complexes of the general formulas [(RC5H4)Fe(CO)EPh]2 and [(RC5H4)Fe(CO)EPh]2PF6 (E = S or Te; R = H or Me): Synthesis, molecular structures, and EPR spectra

Heating of the compounds (RC 5 H 4 )Fe(CO) 2 TePh (R = H ( I ) and Me ( II )) in heptane afforded the dinuclear complexes [(RC 5 H 4 )Fe(CO)TePh] 2 ( III and IV , respectively). By oxidation with Fc + PF 6 − , these complexes were transformed into the paramagnetic cationic complexes [(RC 5 H 4 )Fe(CO)TePh] 2 PF 6 ( V and VI , respectively). Structures III–V and [(C 5 H 5 )Fe(CO)SPh] 2 PF 6 ( VII ) were characterized by X-ray diffraction.