Abstract
In this research work we present the reaction of the precursor complexes [Fe2(CO)6{μ-(SeCH2)2CMeR}] (R = H (1) or Me (2)) with monophosphine/phosphane ligands, PPh3 and P(OMe)3, to afford the mono-substituted complexes [Fe2(CO)5PPh3{μ-(SeCH2)2CHMe}] (3), [Fe2(CO)5PPh3{μ-(SeCH2)2CMe2}] (4), [Fe2(CO)5P(OMe)3{μ-(SeCH2)2CHMe}] (5) and [Fe2(CO)5P(OMe)3{μ-(SeCH2)2CMe2}] (6). The structures of complexes 3–6 were confirmed by X-ray diffraction analysis. Moreover, we studied the influence of the steric interference of the μ-Se-to-Se linker with the nearby ligands (PPh3 and P(OMe)3) on the electronic properties, the solid-state structures and the mechanism of the cathodic process of complexes 3–6 compared to that of 1 and 2. In addition, a detailed electrochemical study of complexes 3–6 in the absence and presence of acetic acid AcOH, is also reported.
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