Mixed rhenium and chromium carbonyl complexes of aroylcyclopentadienyl ligands

Article abstract of DOI:10.1021/om00156a044

A series of (aroylcyclopentadienyl)rhenium tricarbonyls ((η⁵-RC₆H₄COC₅H ₄)Re(CO)₃, R = H, o-CH₃, p-CH₃, p-OCH₃, o-F, p-Cl) and their Cr(CO)₃ ((η⁶-arene)Cr(CO)₃) complexes have been prepared and characterized and studied by IR and ¹H NMR spectroscopy. The carbonyl stretching frequencies of the Re(CO)₃ group and the cyclopentadienyl proton resonances indicate π-electron withdrawal through the ligand system by the Cr(CO)₃ group.