Electrochemical and Spectroscopic Studies on σ-Phenyl Ruthenium Complexes Ru(CO)Cl(C₆H₄R-4)(PⁱPr₃)₂

A series of mononuclear σ-phenyl ruthenium complexes Ru(CO)Cl(C6H4-R)(PiPr3)2 (R = OMe, CH3, H, F, CF3) were synthesized and analyzed with respect to their electrochemical and spectroscopic properties. To these ends, cyclic voltammetry, IR, and UV/Vis/NIR spectroelectrochemistry as well as EPR spectroscopy on their one-electron oxidized radical cations were employed. Experimental work is complimented by quantum chemical calculations. Our studies...