Photoinduced linkage isomerization in new rhenium(I) tricarbonyl complexes coordinated to N-nitrite and O-nitrite

Electrochemical triggered O-atom transfer reaction in nitrocarbonyl rhenium(I) complexes: An IR spectroelectrochemical investigation

“…In both cases, as could be seen in the figure, the wave at 1.9 V corresponds to the oxidation of water present in the solvent of the supporting electrolyte as described in 2.1. As discussed previously for complexes (1) and (2) [25], the cyclic voltammogram shows three oxidation waves. The first one around 1.5 V which was previously assigned to the couples Re II /Re I , a second one irreversible at around 1.8 V and the third one corresponding to a reversible reduction at E 1/2 = 0.24 V and attributable to the reversible nitrosyl couple formed.…”

“…As discussed in previous work [25], both in KBr pellets as in CH 2 Cl 2 solution, the IR spectra of complexes (1) and (2) shows characteristic vibrational modes between 1600 and 600 cm À1 corresponding to the polypyridyl ligands. The carbonyl frequencies (m C"O ) in a facial configuration appear at 2031, 2023 and 1920 cm À1 for (1) and at 2029, 2021 and 1918 cm À1 for (2).…”

“…To confirm this latter assignation, a potential higher than the second oxidation process was applied to the isotopic complex (2 0 ) already synthesized in reference [25]. As observed in Fig.…”

“…Recently, we report the syntheses, characterization and photoinduced linkage isomerism of new polypyridyl rhenium(I)-tricarbonyl complexes with coordinated nitrite ion in the N-and O-binding mode [25]. In relation with this, from the waves observed in the cyclic voltammograms in CH 2 Cl 2 using 0.1 M TBAPF 6 as supporting electrolyte, we proposed that nitrosyl complexes could be obtained in solution by oxidation of the nitro complexes, in concordance with previous reports for ruthenium and osmium nitro complexes [19,26].…”

Molecular structure and nitrite-bonded study on copper(II) complexes of N,N-dialkyl,N′-benzyl-ethylenediamine; synthesis, spectroscopic characterization, X-ray structure, steric effect and density functional theory calculations

“…Several DFT studies on the linkage isomerism of complexes containing a nitrite ligand have previously been performed [7,[22][23][24].…”