Electron transfer reactions of (C5R5)2(CO)2Ti (R=H or Me) with TCNE or TCNQ

Carbon monoxide substitutions by trimethyl phosphite in diiron dithiolate complex: Fe-Fe bond cleavage, selectivity of the substitutions, crystal structures and electrochemical studies

“…The catalytic properties for hydrogen generation by models of [FeFe] hydrogenases can be modified by substitution of one or two (CO) by more donor ligands in order to increase the electron density at the iron atoms enhancing its basicity. This substitution reactions can be carried out under thermal activation [10,11], photochemical activation [12,13] and Electron Transfer Catalysis (ETC) or electrochemical activation [14,15] and is of major importance in organometallic and coordination chemistry in connection with catalytic processes.…”

Theoretical Study of the Electronic Excited States of Tetracyanoethylene and Its Radical Anion

“…An in-depth knowledge of the electronic absorption spectra and the evolution of the recorded features with the oxidation state is particularly important for the characterization of the system. Indeed, the UV/Vis spectrum is employed, for instance, as a fingerprint of the oxidation state of the TCNE unit, [5] as a useful tool to determine the structure and the nature of the CT complexes in which this molecule participates, [6] to detect the formation of dimers, [7,8] or to analyze photoinduced electrontransfer processes in molecular complexes. [9] Furthermore, three major open questions concerning the excited states of [TCNE] À need to be clarified : 1) what is the assignment of the band detected around 5.5-5.8 eV in the UV/ Vis spectrum of this system?…”

Isolation of p-tricyanovinylphenyldicyanomethide ion via a [2+2] cycloaddition of 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules

“…4). The free TCNQ molecule undergoes two reversible one-electron reduction at À0.651 and À0.05 V vs. AgCl/Ag in CH 3 CN [ [1,30], Supplementary material], which is in accord with reversibly reduced in two steps. The compound 1 exhibits two much more anodically shifted one-electron reduction at À0.459 and 0.09 V vs. AgCl/Ag (Scheme 3), indicating that it is easier to reduce for PCQ than the free TCNQ molecule.…”