Electrochemical generation of 19- and 20-electron rhodocenium complexes and their properties

(1,2,3,4,7-Pentamethylindenyl)rhodium complexes with arene ligands

“…4 shows the cyclic voltammetric fingerprint of the Rh(III) monocation 5 in propylene carbonate solution. As expected on the basis of the electrochemical behaviour of either [(C 5 Me 5 )Rh(C 5 H 5 )] + or the unsubstituted indenyl analogue [(g 5 -C 9 H 7 )Rh(C 5 Me 5 )] + [23], it undergoes the sequence Rh(III)/Rh(II)/Rh(I) through two separate steps featuring chemical reversibility in the cyclic voltammetric time scale. The first reduction proved to be chemically reversible also in the electrolysis time scale, even if we did not succeed to complete the one-electron addition because of the slow continuous reoxidation at the macroelectrolysis electrode, probably triggered by traces of air.…”

The Organometallic Chemistry of Rh‐, Ir‐, Pd‐, and Pt‐Based Radicals: Higher Valent Species

“…If, on the other hand, the spin density is located preferentially on either the Cp or Cp* ring, only one symmetric product would be expected. A tentative explanation for the preferential formation of the nonsymmetrical species [M I (Cp*)(m-Z 4 ,Z 4 -C 5 H 5 À ÀC 5 Me 5 )M I (Cp)] was suggested by the authors (81)(82)(83). Reduction of the diamagnetic cationic species will result in rather nucleophilic 19-VE radicals [M II (Cp*)(Cp)], which could attack any nonreacted cationic starting material with a steric preference for attack at the nonsubstituted Cp ring of [M III (Cp)(Cp*)] þ .…”

Dopant controlled trap-filling and conductivity enhancement in an electron-transport polymer

“…[RhCp*Cp] 2 was synthesized as described elsewhere. 22,23 P(NDI 2 OD-T 2 ) was purchased from Polyera and processed as-received. P(NDI 2 OD-T 2 ) and the dopant were dissolved separately at room temperature in toluene for 8 h. Undoped films cast from other solvents, such as chlorobenzene, dichlorobenzene, and chloroform, yielded immeasurably low currents in the device configuration used here (see below).…”