The electrochemistry of a series of rhenium(I) complexes, namely [Re(CO)2 (Ph3)2{(ArN)2X}] (X = N, CH; Ar = C6H5, C6H4Me-p, C6H4Cl-p, C6H4F-p), has been studied in different nonaqueous solvents (CH2Cl2, MeCN, Me2CO). The rhenium(I)/ rhenium(II) redox change occurs at potentials varying from +0.60 V to +0.90 V (vs S.C.E.), depending upon the electron donating ability of the aryl groups. At room temperature this oxidation is complicated by slow following chemical reactions (proposed as the competing photochemical-thermal self-reduction and intramolecular oxidation processes), but below 0°C the electrogenerated rhenium(II) complexes, which are isostructural with their rhenium(I) precursors, are sufficiently stable to be characterized by UV-Visible, IR and ESR spectroscopy. © 1988.
REDOX PROPERTIES OF A SERIES OF PSEUDOALLYL RHENIUM(I) COMPLEXES
DUATTI, Adriano;
1988
Abstract
The electrochemistry of a series of rhenium(I) complexes, namely [Re(CO)2 (Ph3)2{(ArN)2X}] (X = N, CH; Ar = C6H5, C6H4Me-p, C6H4Cl-p, C6H4F-p), has been studied in different nonaqueous solvents (CH2Cl2, MeCN, Me2CO). The rhenium(I)/ rhenium(II) redox change occurs at potentials varying from +0.60 V to +0.90 V (vs S.C.E.), depending upon the electron donating ability of the aryl groups. At room temperature this oxidation is complicated by slow following chemical reactions (proposed as the competing photochemical-thermal self-reduction and intramolecular oxidation processes), but below 0°C the electrogenerated rhenium(II) complexes, which are isostructural with their rhenium(I) precursors, are sufficiently stable to be characterized by UV-Visible, IR and ESR spectroscopy. © 1988.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
